668538991 is an odd 9-digits composite number following 668538990
and preceding 668538992 . In scientific notation, it is written as 6.68538991 × 10^8.
The sum of its digits is 55. It has a total of 3 prime factors and 8 positive divisors.
There are 628978560 positive integers (up to 668538991) that are relatively prime to 668538991.
668538991 has 8 divisors, whose sum is 708128784
The reverse of 668538991 is 199835866
Previous prime number is 11131
Is Prime? no Number parity odd Number length 9 Sum of Digits 55 Digital Root 1
Name
six hundred sixty-eight million five hundred thirty-eight thousand nine hundred ninety-one
Scientific notation
6.68538991 × 10^8
Engineering notation
6.68538991 × 10^6
Prime Factorization
17 × 11131 × 3533
Composite number
ω Distinct Factors
3 Total number of distinct prime factors
Ω Total Factors
3 Total number of prime factors
rad Radical
668538991 Product of the distinct prime numbers
The prime factorization of 668538991 is 17 × 11131 × 3533.
Since it has a total of 3 prime factors.
8 , 2 , 49 , 96 , 308 , 897 , 9176 , 3904 , 77929 , 95794 , 197503 , 244723 , 4616827 , 8133080 , 34299218 , 10224090 , 538068964 , 164142948 , 4373880693 , 5053676454
n×2
1337077982
n×3
2005616973
n×4
2674155964
n×5
3342694955
n÷2
334269495.5
n÷3
222846330.33333
n÷3
167134747.75
n÷5
133707798.2
n2
446944382487298081
n3
2.9879974650118E+26
n4
1.9975928103695E+35
n5
1.3354686818733E+44
2 √n25856.120958102
3 √n874.39751330367
4 √n160.79838605565
5 √n58.213719417557
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
-668538990 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 668538991 can be divided by 8 positive divisors.
The sum of these divisors (counting 668538991) is 1, the average is 0.125.
Base
System
Value
2
Binary
100111110110010001100001101111
3
Ternary
1201120222022002101
4
Quaternary
213312101201233
5
Quinary
2332121221431
6
Senary
150201035531
8
Octal
4766214157
10
Decimal
668538991
12
Duodecimal
167a85ba7
16
Hexadecimal
27d9186f
20
Vigesimal
a8i779b
36
Base36
b213zj
md5
463dd01b08a0eb63916b8fb991190c77
sha1
2cde114c5f1a0e4f2fa6784145e2c79479bb1424
sha256
8b8460659f987547fd55a65571547fa1476f6d604f409ab9a30a74c819ed005e
sha512
594c067335a980575ce61f901b1f66e98e90798daab2db19191dd7289abe46303e5f79ecd61ebe59523af81019c0ab9b7cf504c210cf7958da5a8e51629506c4
ripemd-160
8d109ac5c719c5f0c7451f1553c924fc63dc5796
Diameter
1337077982
Circumference
4200554365.5279
Area
1.4041171885853E+18
Volume
1.2516094513368E+27
Surface area
5.6164687543413E+18
Circumference
4200554365.5279
Perimeter
2674155964
Area
446944382487298081
Diagonal
945456908.04742
Surface area
2681666294923788486
Volume
2.9879974650118E+26
Space diagonal
1157943499.2528
Perimeter
2005616973
Area
1.9353259465637E+17
Altitude
578971749.62642
Surface area
1.9353259465637E+17
Volume
3.5213887827967E+25
Height
315152302.68247