6641272036 has 27 divisors (see below), whose sum is σ = 13522055337. Its totient is φ = 2845770480.

The previous prime is 6641272031. The next prime is 6641272039. The reversal of 6641272036 is 6302721466.

The square root of 6641272036 is 81494.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5776912036 + 864360000 = 76006^2 + 29400^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6641271986 and 6641272004.

It is not an unprimeable number, because it can be changed into a prime (6641272031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1138006 + ... + 1143826.

Almost surely, 2^6641272036 is an apocalyptic number.

6641272036 is the 81494-th square number.

It is an amenable number.

6641272036 is an abundant number, since it is smaller than the sum of its proper divisors (6880783301).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6641272036 is an frugal number, since it uses more digits than its factorization.

6641272036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11660 (or 5830 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The cubic root of 6641272036 is about 1879.6792907739.

The spelling of 6641272036 in words is "six billion, six hundred forty-one million, two hundred seventy-two thousand, thirty-six".