81666 (number)

81666 is an even 5-digits composite number following 81665 and preceding 81667. In scientific notation, it is written as 8.1666 × 10^4. The sum of its digits is 27. It has a total of 4 prime factors and 16 positive divisors. There are 25056 positive integers (up to 81666) that are relatively prime to 81666.

Interesting facts

Basic properties

Name

Name eighty-one thousand six hundred sixty-six

Notation

Scientific notation 8.1666 × 10^4
Engineering notation 8.1666 × 10^3

Prime Factorization of 81666

Prime Factorization 2 × 9 × 13 × 349

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 81666
Product of the distinct prime numbers

The prime factorization of 81666 is 2 × 9 × 13 × 349. Since it has a total of 4 prime factors.

Most popular turbo-numbers

5, 8, 22, 12, 365, 972, 2609, 2788, 42040, 87005, 907430, 747308, 7830192, 4878959, 49178788, 90482209, 256471274, 316705738, 5722163364, 3421831237

Basic calculations (n = 81666)

Multiplication

n×y
n×2 163332
n×3 244998
n×4 326664
n×5 408330

Division

n÷y
n÷2 40833
n÷3 27222
n÷3 20416.5
n÷5 16333.2

Exponentiation

ny
n2 6669335556
n3 544657957516296
n4 4.4480036758526E+19
n5 3.6325066819218E+24

Nth Root

y√n
2√n 285.77263689864
3√n 43.385748539775
4√n 16.904811057762
5√n 9.6030293646379

Divisors of 81666

1, 2, 9, 13, 18, 26, 117, 234, 349, 698, 3141, 4537, 6282, 9074, 40833, 81666

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81665
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
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 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81666 can be divided by 16 positive divisors. The sum of these divisors (counting 81666) is 1, the average is 0.0625.

Base conversion 81666

Base System Value
2 Binary 10011111100000010
3 Ternary 11011000200
4 Quaternary 103330002
5 Quinary 10103131
6 Senary 1430030
8 Octal 237402
10 Decimal 81666
12 Duodecimal 3b316
16 Hexadecimal 13f02
20 Vigesimal a436
36 Base36 1r0i

Cryptographic Hash Functions

md5 4fd5e819b37dfc2766335f1ae045acd5
sha1 6eba85ffe356008542813bb1534d8c9158f1b979
sha256 1ad0af88d83e6dd6cc41ae6189a4150d4300db2e0c370d116a07a6ee4094597a
sha512 e9c30cc677b32d7cbbb8f8b1515004aad4ec648addee219b609ce92fec378e5911dce7c1cc4f9f6e30c822b79c2662a148e375c6f102297bf68f8c3523d7e78b
ripemd-160 91a58826f38f1f6d4f530f5d55143431943b3953

81666 as geometric shapes

Circle

Radius = n
Diameter 163332
Circumference 513122.61129613
Area 20952335587.055

Sphere

Radius = n
Volume 2.2814579174032E+15
Surface area 83809342348.219
Circumference 513122.61129613

Square

Length = n
Perimeter 326664
Area 6669335556
Diagonal 115493.16478476

Cube

Length = n
Surface area 40016013336
Volume 544657957516296
Space diagonal 141449.66125092

Equilateral Triangle

Length = n
Perimeter 244998
Area 2887907008.9294
Altitude 70724.83062546

Triangular Pyramid

Length = n
Surface area 2887907008.9294
Volume 64188555864498
Height 38497.72159492