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

81665 (number)

81665 is an odd 5-digits composite number following 81664 and preceding 81666. In scientific notation, it is written as 8.1665 × 10^4. The sum of its digits is 26. It has a total of 2 prime factors and 4 positive divisors. There are 65328 positive integers (up to 81665) that are relatively prime to 81665.

Interesting facts

81665 has 4 divisors, whose sum is 98004
The reverse of 81665 is 56618
Previous prime number is 5

Basic properties

Is Prime? no
Number parity odd
Number length 5
Sum of Digits 26
Digital Root 8

Name

Name	eighty-one thousand six hundred sixty-five

Notation

Scientific notation	8.1665 × 10^4
Engineering notation	8.1665 × 10^3

Prime Factorization of 81665

Prime Factorization 5 × 16333

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81665	Product of the distinct prime numbers

The prime factorization of 81665 is 5 × 16333. Since it has a total of 2 prime factors.

Most popular turbo-numbers

3, 9, 78, 76, 644, 976, 6194, 549, 22459, 59308, 290626, 64630, 8793225, 392679, 84815044, 65992496, 241922692, 66517488, 5719591712, 3363422920

Basic calculations (n = 81665)

Multiplication

n×y

n×2	163330
n×3	244995
n×4	326660
n×5	408325

Division

n÷y

n÷2	40832.5
n÷3	27221.666666667
n÷3	20416.25
n÷5	16333

Exponentiation

n^y

n²	6669172225
n³	544637949754625
n⁴	4.4477858166711E+19
n⁵	3.6322842871845E+24

Nth Root

^y√n

²√n	285.77088725061
³√n	43.385571452919
⁴√n	16.90475930768
⁵√n	9.6030058467078

Divisors of 81665

1, 5, 16333, 81665

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	-81664	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 81665 can be divided by 4 positive divisors. The sum of these divisors (counting 81665) is 1, the average is 0.25.

Base conversion 81665

Base	System	Value
2	Binary	10011111100000001
3	Ternary	11011000122
4	Quaternary	103330001
5	Quinary	10103130
6	Senary	1430025
8	Octal	237401
10	Decimal	81665
12	Duodecimal	3b315
16	Hexadecimal	13f01
20	Vigesimal	a435
36	Base36	1r0h

Cryptographic Hash Functions

md5	036243fcd63213ae19bdcc24d1fa0a33
sha1	96336339ad7a40eafc0a760d23020881c81ab8b3
sha256	d3239006c2cd8895fc842a9881af90adc29c4d36d281fb8d074395e78e40e620
sha512	c7e0dffea6923d02e6aa4dd54e054aef2f760434c5092daff654cb6e5c30b05146c1bd90a0904f6d7f3acff33cf3773032a61e69d2f73485b4f80280794fc383
ripemd-160	09e0733412522eb8e5ab0dec8222f38ee01706b4

81665 as geometric shapes

Circle

Radius = n

Diameter	163330
Circumference	513116.32811082
Area	20951822467.585

Sphere

Radius = n

Volume	2.2813741090871E+15
Surface area	83807289870.34
Circumference	513116.32811082

Square

Length = n

Perimeter	326660
Area	6669172225
Diagonal	115491.7505712

Cube

Length = n

Surface area	40015033350
Volume	544637949754625
Space diagonal	141447.92920011

Equilateral Triangle

Length = n

Perimeter	244995
Area	2887836284.5318
Altitude	70723.964600056

Triangular Pyramid

Length = n

Surface area	2887836284.5318
Volume	64186197927172
Height	38497.2501904