668727981 is an odd 9-digits composite number following 668727980
and preceding 668727982 . In scientific notation, it is written as 6.68727981 × 10^8.
The sum of its digits is 54. It has a total of 3 prime factors and 8 positive divisors.
There are 445818492 positive integers (up to 668727981) that are relatively prime to 668727981.
668727981 has 8 divisors, whose sum is 770551040
The reverse of 668727981 is 189727866
Previous prime number is 27
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 54
Digital Root 9
Name
six hundred sixty-eight million seven hundred twenty-seven thousand nine hundred eighty-one
Scientific notation
6.68727981 × 10^8
Engineering notation
6.68727981 × 10^6
Prime Factorization
9 × 27 × 2751967
Composite number
ω
Distinct Factors
3
Total number of distinct prime factors
Ω
Total Factors
3
Total number of prime factors
rad
Radical
668727981
Product of the distinct prime numbers
The prime factorization of 668727981 is 9 × 27 × 2751967.
Since it has a total of 3 prime factors.
7 , 10 , 94 , 29 , 990 , 796 , 7569 , 4130 , 31671 , 61976 , 44994 , 492849 , 2575133 , 490518 , 61396157 , 98517868 , 205924382 , 544260351 , 1054854107 , 1825744354
n×2
1337455962
n×3
2006183943
n×4
2674911924
n×5
3343639905
n÷2
334363990.5
n÷3
222909327
n÷3
167181995.25
n÷5
133745596.2
n2
447197112572336361
n3
2.9905322219953E+26
n4
1.9998525749303E+35
n5
1.3373573747308E+44
2 √n
25859.775347052
3 √n
874.47990032917
4 √n
160.80974891794
5 √n
58.217010345131
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
-668727980
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 668727981 can be divided by 8 positive divisors.
The sum of these divisors (counting 668727981) is 1, the average is 0.125.
Base
System
Value
2
Binary
100111110110111111101010101101
3
Ternary
1201121022220100000
4
Quaternary
213312333222231
5
Quinary
2332143243411
6
Senary
150205054513
8
Octal
4766775255
10
Decimal
668727981
12
Duodecimal
167b57439
16
Hexadecimal
27dbfaad
20
Vigesimal
a8jajj1
36
Base36
b255t9
md5
4b00b975b723e700b345ce360a4ab496
sha1
bd196c76a519748327de3edb390558bf0e44614e
sha256
09079b7426355811d0c4410046e3f00f3bba0693f8f1cac60ab30f19b7b7d451
sha512
c845f7580128c6fc04d6f7df34ff2e21d34c4a52c4d18420f42806d4ca855d2d77f18268f93d522241b7e961066ee9042d8db877939ddcafe632a696382d742d
ripemd-160
06259ff552afa39ad5792dde17dcc27f749714c5
Diameter
1337455962
Circumference
4201741824.7191
Area
1.4049111635638E+18
Volume
1.2526712078592E+27
Surface area
5.6196446542553E+18
Circumference
4201741824.7191
Perimeter
2674911924
Area
447197112572336361
Diagonal
945724180.26858
Surface area
2683182675434018166
Volume
2.9905322219953E+26
Space diagonal
1158270839.535
Perimeter
2006183943
Area
1.9364202999335E+17
Altitude
579135419.76748
Surface area
1.9364202999335E+17
Volume
3.5243760225496E+25
Height
315241393.42286