764396664 has 16 divisors (see below), whose sum is σ = 1910991720. Its totient is φ = 254798880.

The previous prime is 764396641. The next prime is 764396693. The reversal of 764396664 is 466693467.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15924907 + ... + 15924954.

Almost surely, 2^764396664 is an apocalyptic number.

It is an amenable number.

764396664 is an abundant number, since it is smaller than the sum of its proper divisors (1146595056).

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

764396664 is a wasteful number, since it uses less digits than its factorization.

764396664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31849870 (or 31849866 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 51.

The square root of 764396664 is about 27647.7243909874. The cubic root of 764396664 is about 914.3369295064.

The spelling of 764396664 in words is "seven hundred sixty-four million, three hundred ninety-six thousand, six hundred sixty-four".