Question: What is the square root of the sum of the digits of the product of 6645 and its reverse?

To find the product of 6645 and its reverse, we multiply 6645 by 5466, giving us 36315770. The sum of the digits in this product is 3+6+3+1+5+7+7+0=32. Taking the square root of 32, we get approximately 5.656854249. Therefore, the answer is 5.656854249.

Math Question: What is the sum of all even numbers less than 6645 and divisible by both 3 and 5?

To find the solution, we consider the arithmetic progression formed by these numbers: 15, 45, 75, 105, … The last term of this sequence is 6645 (the largest number less than 6645 and divisible by both 3 and 5). We can calculate the number of terms (n) using the formula: a_n = a_1 + (n - 1)d, where a_1 = 15, a_n = 6645, and d = 30 (the common difference). Solving for n, we get n = (a_n - a_1 + d) / d = (6645 - 15 + 30) / 30 = 221. Now, we find the sum using the formula: S_n = (n/2)(a_1 + a_n), where S_n is the sum of n terms. Plugging in the values, S_n = (221/2)(15 + 6645) = 221/2 * 6660 = 738,630. Therefore, the sum of all even numbers less than 6645 and divisible by both 3 and 5 is 738,630.

Math Question: If 6645 is divided by the sum of its digits subtracted from their product, what is the quotient?

To find the sum of the digits, we add 6 + 6 + 4 + 5 = 21. Their product is 6 × 6 × 4 × 5 = 720. Considering 6645 ÷ (720 - 21), the divisor becomes 699. Therefore, the quotient is 6645 ÷ 699 = 9.5 (rounded to one decimal place). In conclusion, the division of 6645 by the subtraction of the sum of its digits from their product equals 9.5.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

6645 (number)

6645 is an odd 4-digits composite number following 6644 and preceding 6646. In scientific notation, it is written as 6.645 × 10^3. The sum of its digits is 21. It has a total of 3 prime factors and 8 positive divisors. There are 3536 positive integers (up to 6645) that are relatively prime to 6645.

Interesting facts

6645 has 8 divisors, whose sum is 10656
The reverse of 6645 is 5466
Previous prime number is 5

Basic properties

Is Prime? no
Number parity odd
Number length 4
Sum of Digits 21
Digital Root 3

Name

Name	six thousand six hundred forty-five

Notation

Scientific notation	6.645 × 10^3
Engineering notation	6.645 × 10^3

Prime Factorization of 6645

Prime Factorization 3 × 5 × 443

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	6645	Product of the distinct prime numbers

The prime factorization of 6645 is 3 × 5 × 443. Since it has a total of 3 prime factors.

Most popular turbo-numbers

1, 7, 89, 24, 919, 773, 6116, 9706, 74676, 67164, 747440, 287143, 6254772, 9191463, 63249537, 50186122, 754993392, 117001765, 9816012594, 3394961107

Basic calculations (n = 6645)

Multiplication

n×y

n×2	13290
n×3	19935
n×4	26580
n×5	33225

Division

n÷y

n÷2	3322.5
n÷3	2215
n÷3	1661.25
n÷5	1329

Exponentiation

n^y

n²	44156025
n³	293416786125
n⁴	1949754543800625
n⁵	1.2956118943555E+19

Nth Root

^y√n

²√n	81.516869419771
³√n	18.800309335487
⁴√n	9.02866930504
⁵√n	5.8143208956828

Divisors of 6645

1, 3, 5, 15, 443, 1329, 2215, 6645

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-6644	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 6645 can be divided by 8 positive divisors. The sum of these divisors (counting 6645) is 1, the average is 0.125.

Base conversion 6645

Base	System	Value
2	Binary	1100111110101
3	Ternary	100010010
4	Quaternary	1213311
5	Quinary	203040
6	Senary	50433
8	Octal	14765
10	Decimal	6645
12	Duodecimal	3a19
16	Hexadecimal	19f5
20	Vigesimal	gc5
36	Base36	54l

Cryptographic Hash Functions

md5	b8fd7211e5247891e4d4f0562418868a
sha1	52e26977ccf4960393ee5a39eeee9ac14ed54700
sha256	5e534a8354549cea9a90f8241746d38ceb5adcbbb7e686872ddc799632c494aa
sha512	b552e8e3ee8b65fe7cc96c76749ea876bbcaf55bac4fd0805b74b6e94bf0a6379fbe7394883342d8336a41e4a1edb0d61c73750002058e99725c68e28d049b5a
ripemd-160	a56a2f5c62681ade82ed72be424ea988e72a9389

6645 as geometric shapes

Circle

Radius = n

Diameter	13290
Circumference	41751.766366208
Area	138720243.75173

Sphere

Radius = n

Volume	1229061359640.3
Surface area	554880975.00691
Circumference	41751.766366208

Square

Length = n

Perimeter	26580
Area	44156025
Diagonal	9397.4491219692

Cube

Length = n

Surface area	264936150
Volume	293416786125
Space diagonal	11509.477616295

Equilateral Triangle

Length = n

Perimeter	19935
Area	19120119.69007
Altitude	5754.7388081476

Triangular Pyramid

Length = n

Surface area	19120119.69007
Volume	34579499863.825
Height	3132.4830406564