77664664 has 32 divisors (see below), whose sum is σ = 181555200. Its totient is φ = 30258720.

The previous prime is 77664659. The next prime is 77664673. The reversal of 77664664 is 46646677.

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, 62424 + ... + 63655.

It is an arithmetic number, because the mean of its divisors is an integer number (5673600).

Almost surely, 2^77664664 is an apocalyptic number.

It is an amenable number.

77664664 is an abundant number, since it is smaller than the sum of its proper divisors (103890536).

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

77664664 is a wasteful number, since it uses less digits than its factorization.

77664664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126103 (or 126099 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 46.

The square root of 77664664 is about 8812.7557551540. The cubic root of 77664664 is about 426.6526910570.

The spelling of 77664664 in words is "seventy-seven million, six hundred sixty-four thousand, six hundred sixty-four".