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

81668081 (number)

81668081 is an odd 8-digits composite number following 81668080 and preceding 81668082. In scientific notation, it is written as 8.1668081 × 10^7. The sum of its digits is 38. It has a total of 3 prime factors and 8 positive divisors. There are 73026000 positive integers (up to 81668081) that are relatively prime to 81668081.

Interesting facts

81668081 has 8 divisors, whose sum is 90553728
The reverse of 81668081 is 18086618
Previous prime number is 61

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 38
Digital Root 2

Name

Name	eighty-one million six hundred sixty-eight thousand eighty-one

Notation

Scientific notation	8.1668081 × 10^7
Engineering notation	8.1668081 × 10^6

Prime Factorization of 81668081

Prime Factorization 11 × 61 × 121711

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	81668081	Product of the distinct prime numbers

The prime factorization of 81668081 is 11 × 61 × 121711. Since it has a total of 3 prime factors.

Most popular turbo-numbers

10, 4, 12, 77, 674, 528, 6208, 8003, 10897, 87615, 963477, 958314, 3306898, 4798335, 14272550, 14824900, 236415511, 238862685, 1447817305, 6800011658

Basic calculations (n = 81668081)

Multiplication

n×y

n×2	163336162
n×3	245004243
n×4	326672324
n×5	408340405

Division

n÷y

n÷2	40834040.5
n÷3	27222693.666667
n÷3	20417020.25
n÷5	16333616.2

Exponentiation

n^y

n²	6669675454222561
n³	5.4469959523916E+23
n⁴	4.4484570664659E+31
n⁵	3.6329695202916E+39

Nth Root

^y√n

²√n	9037.0393935182
³√n	433.86117052889
⁴√n	95.063344110747
⁵√n	38.230543324925

Divisors of 81668081

1, 11, 61, 671, 121711, 1338821, 7424371, 81668081

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	-81668080	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 81668081 can be divided by 8 positive divisors. The sum of these divisors (counting 81668081) is 1, the average is 0.125.

Base conversion 81668081

Base	System	Value
2	Binary	100110111100010011111110001
3	Ternary	12200200011112202
4	Quaternary	10313202133301
5	Quinary	131401334311
6	Senary	12034232545
8	Octal	467423761
10	Decimal	81668081
12	Duodecimal	23425755
16	Hexadecimal	4de27f1
20	Vigesimal	15a8a41
36	Base36	1cmfht

Cryptographic Hash Functions

md5	0d874cc6c0e8bf18ba3b3e52b3b8384b
sha1	4e36a52e2e9d2c546004448148f3c6fd4bcf574f
sha256	0d4461d9b7db7e3e4b3a755fd7c272adcf5fef3a686ef3fb8dd3fec5fea272e1
sha512	22871e629bd6644b6c310645bdecac378950e2d913cb93d4c4cbc6b01a066788c714c95de8cf3424b573f7497637a952eac99e70a2793437bb78b9daed47775a
ripemd-160	f91c615c7b8058b8959119780b59315e8bdd34a4

81668081 as geometric shapes

Circle

Radius = n

Diameter	163336162
Circumference	513135686.60475
Area	2.0953403408814E+16

Sphere

Radius = n

Volume	2.2816323290889E+24
Surface area	8.3813613635255E+16
Circumference	513135686.60475

Square

Length = n

Perimeter	326672324
Area	6669675454222561
Diagonal	115496107.76318

Cube

Length = n

Surface area	40018052725335366
Volume	5.4469959523916E+23
Space diagonal	141453265.64865

Equilateral Triangle

Length = n

Perimeter	245004243
Area	2.8880541891771E+15
Altitude	70726632.824325

Triangular Pyramid

Length = n

Surface area	2.8880541891771E+15
Volume	6.4193462917196E+22
Height	38498702.587728