764624668 has 12 divisors (see below), whose sum is σ = 1340034472. Its totient is φ = 381757680.

The previous prime is 764624593. The next prime is 764624669. The reversal of 764624668 is 866426467.

It is a happy number.

It is a super-2 number, since 2×764624668² = 1169301765828220448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764624669) 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 3 ways as a sum of consecutive naturals, for example, 135555 + ... + 141082.

Almost surely, 2^764624668 is an apocalyptic number.

It is an amenable number.

764624668 is a deficient number, since it is larger than the sum of its proper divisors (575409804).

764624668 is a wasteful number, since it uses less digits than its factorization.

764624668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277332 (or 277330 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 49.

The square root of 764624668 is about 27651.8474608841. The cubic root of 764624668 is about 914.4278298477.

The spelling of 764624668 in words is "seven hundred sixty-four million, six hundred twenty-four thousand, six hundred sixty-eight".