664577917112 has 32 divisors (see below), whose sum is σ = 1260188863200. Its totient is φ = 328528172544.

The previous prime is 664577917093. The next prime is 664577917123. The reversal of 664577917112 is 211719775466.

It is a congruent number.

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, 10636748 + ... + 10699044.

It is an arithmetic number, because the mean of its divisors is an integer number (39380901975).

Almost surely, 2^664577917112 is an apocalyptic number.

It is an amenable number.

664577917112 is a deficient number, since it is larger than the sum of its proper divisors (595610946088).

664577917112 is a wasteful number, since it uses less digits than its factorization.

664577917112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77375 (or 77371 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 56.

The spelling of 664577917112 in words is "six hundred sixty-four billion, five hundred seventy-seven million, nine hundred seventeen thousand, one hundred twelve".