Math question: If there are 669 students in a school, and 30% of them are taking advanced math courses, how many students are taking advanced math courses?

To find the number of students taking advanced math courses, we multiply the total number of students (669) by the percentage taking advanced math (30/100). Number of students taking advanced math = 669 * 30/100 = 669 * 0.3 = 200.7. Since we can't have a fraction of a student, we round down to the nearest whole number. Therefore, 200 students are taking advanced math courses.

Question: If 669 is divided by 3 and then multiplied by 2, what is the result?

To find the result, divide 669 by 3: 669 ÷ 3 = 223. Now, multiply 223 by 2: 223 × 2 = 446. Therefore, if 669 is divided by 3 and then multiplied by 2, the result is 446.

Question: What is the remainder when 669 is divided by 7, and how many times does 669 contain the digit 6?

When 669 is divided by 7, the remainder is 4. Additionally, 669 contains the digit 6 exactly 2 times.

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

669 (number)

669 is an odd 3-digits composite number following 668 and preceding 670. In scientific notation, it is written as 6.69 × 10^2. The sum of its digits is 21. It has a total of 2 prime factors and 4 positive divisors. There are 444 positive integers (up to 669) that are relatively prime to 669.

Interesting facts

669 has 4 divisors, whose sum is 896
The reverse of 669 is 966
Previous prime number is 3

Basic properties

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

Name

Name	six hundred sixty-nine

Notation

Scientific notation	6.69 × 10^2
Engineering notation	6.69 × 10^0

Prime Factorization of 669

Prime Factorization 3 × 223

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	669	Product of the distinct prime numbers

The prime factorization of 669 is 3 × 223. Since it has a total of 2 prime factors.

Most popular turbo-numbers

9, 1, 81, 67, 744, 993, 7836, 6364, 94650, 73861, 622949, 399034, 1348964, 7007986, 21046006, 60214807, 854622395, 737389242, 639634239, 2588267963

Basic calculations (n = 669)

Multiplication

n×y

n×2	1338
n×3	2007
n×4	2676
n×5	3345

Division

n÷y

n÷2	334.5
n÷3	223
n÷3	167.25
n÷5	133.8

Exponentiation

n^y

n²	447561
n³	299418309
n⁴	200310848721
n⁵	134007957794349

Nth Root

^y√n

²√n	25.865034312755
³√n	8.7459845521172
⁴√n	5.0857678193912
⁵√n	3.6735438102292

Divisors of 669

1, 3, 223, 669

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-668	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	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	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 669 can be divided by 4 positive divisors. The sum of these divisors (counting 669) is 1, the average is 0.25.

Base conversion 669

Base	System	Value
2	Binary	1010011101
3	Ternary	220210
4	Quaternary	22131
5	Quinary	10134
6	Senary	3033
8	Octal	1235
10	Decimal	669
12	Duodecimal	479
16	Hexadecimal	29d
20	Vigesimal	1d9
36	Base36	il

Cryptographic Hash Functions

md5	5c04925674920eb58467fb52ce4ef728
sha1	9f3bdbf605248e180acba43499e6c6cbcec07427
sha256	bf31e6128301d31bb4014faf6b1e0f05f3ab8877cb55ce3d1ab3230d2ea8a220
sha512	d0c92d838a6575a8ece5755d6967f2f0e71ddb4b130e6f3ae08bb113f96cfdf4045a55bc098028bb56b17cad9a92e0f6cd807237bc380b5cd5310603099b620c
ripemd-160	4acefe04d15e5fecbbe384c1b9b3699a88d3037b

669 as geometric shapes

Circle

Radius = n

Diameter	1338
Circumference	4203.4509705031
Area	1406054.3496333

Sphere

Radius = n

Volume	1254200479.8729
Surface area	5624217.3985332
Circumference	4203.4509705031

Square

Length = n

Perimeter	2676
Area	447561
Diagonal	946.1088732276

Cube

Length = n

Surface area	2685366
Volume	299418309
Space diagonal	1158.7419902636

Equilateral Triangle

Length = n

Perimeter	2007
Area	193799.59787158
Altitude	579.37099513179

Triangular Pyramid

Length = n

Surface area	193799.59787158
Volume	35286786.117552
Height	315.3696244092