661243721 (number)

661243721 is an odd 9-digits composite number following 661243720 and preceding 661243722. In scientific notation, it is written as 6.61243721 × 10^8. The sum of its digits is 32. It has a total of 4 prime factors and 16 positive divisors. There are 618414720 positive integers (up to 661243721) that are relatively prime to 661243721.

Interesting facts

Basic properties

Name

Name six hundred sixty-one million two hundred forty-three thousand seven hundred twenty-one

Notation

Scientific notation 6.61243721 × 10^8
Engineering notation 6.61243721 × 10^6

Prime Factorization of 661243721

Prime Factorization 61 × 23 × 179 × 2633

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 661243721
Product of the distinct prime numbers

The prime factorization of 661243721 is 61 × 23 × 179 × 2633. Since it has a total of 4 prime factors.

Most popular turbo-numbers

7, 4, 14, 83, 470, 348, 6494, 3209, 66032, 88502, 188528, 175196, 9334226, 7276602, 15817158, 24661173, 832855827, 349765875, 6597384985, 4687158805

Basic calculations (n = 661243721)

Multiplication

n×y
n×2 1322487442
n×3 1983731163
n×4 2644974884
n×5 3306218605

Division

n÷y
n÷2 330621860.5
n÷3 220414573.66667
n÷3 165310930.25
n÷5 132248744.2

Exponentiation

ny
n2 437243258561925841
n3 2.8912435927365E+26
n4 1.9118166715785E+35
n5 1.2641767697844E+44

Nth Root

y√n
2√n 25714.659651646
3√n 871.20532321765
4√n 160.35791109779
5√n 58.086112577859

Divisors of 661243721

1, 23, 61, 179, 1403, 2633, 4117, 10919, 60559, 160613, 251137, 471307, 3694099, 10840061, 28749727, 661243721

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 -661243720
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 661243721 can be divided by 16 positive divisors. The sum of these divisors (counting 661243721) is 1, the average is 0.0625.

Base conversion 661243721

Base System Value
2 Binary 100111011010011100011101001001
3 Ternary 1201002020122212012
4 Quaternary 213122130131021
5 Quinary 2323234244341
6 Senary 145340425305
8 Octal 4732343511
10 Decimal 661243721
12 Duodecimal 165548235
16 Hexadecimal 2769c749
20 Vigesimal a6cf961
36 Base36 axoqx5

Cryptographic Hash Functions

md5 bfe43a26a1db3cdebe10d59f9cef12b7
sha1 f57c83cd43f08acbe8a3fde715a54d494ba13479
sha256 2d06fb51b0560a92a100e68dfe6d26d2580c07809ccfbe876af6824c048489e0
sha512 88d7c3d46c25b3cfda7a9ec19bde06e6fc87a721f218b7e4159e46fb72730a343c5704e4f3fac27ee987fe8d004fe66366393333117bc26e7e0e67df0b75a685
ripemd-160 775dfa3b0f22f8917505e4c977ad9e92508c9df8

661243721 as geometric shapes

Circle

Radius = n
Diameter 1322487442
Circumference 4154716832.252
Area 1.3736402089298E+18

Sphere

Radius = n
Volume 1.2110812840906E+27
Surface area 5.4945608357192E+18
Circumference 4154716832.252

Square

Length = n
Perimeter 2644974884
Area 437243258561925841
Diagonal 935139838.27225

Cube

Length = n
Surface area 2623459551371555046
Volume 2.8912435927365E+26
Space diagonal 1145307720.9579

Equilateral Triangle

Length = n
Perimeter 1983731163
Area 1.8933188477406E+17
Altitude 572653860.47895

Triangular Pyramid

Length = n
Surface area 1.8933188477406E+17
Volume 3.4073632508103E+25
Height 311713279.42408