664973108928 has 56 divisors (see below), whose sum is σ = 1954897802160. Its totient is φ = 221657702400.

The previous prime is 664973108911. The next prime is 664973108941. The reversal of 664973108928 is 829801379466.

664973108928 is a `hidden beast` number, since 66 + 497 + 3 + 1 + 0 + 89 + 2 + 8 = 666.

664973108928 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192409473 + ... + 192412928.

Almost surely, 2^664973108928 is an apocalyptic number.

It is an amenable number.

664973108928 is an abundant number, since it is smaller than the sum of its proper divisors (1289924693232).

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

664973108928 is a wasteful number, since it uses less digits than its factorization.

664973108928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384822422 (or 384822406 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 664973108928 in words is "six hundred sixty-four billion, nine hundred seventy-three million, one hundred eight thousand, nine hundred twenty-eight".