764664 has 32 divisors (see below), whose sum is σ = 1933440. Its totient is φ = 252000.

The previous prime is 764657. The next prime is 764683. The reversal of 764664 is 466467.

It is a super-2 number, since 2×764664² = 1169422065792, which contains 22 as substring.

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, 3519 + ... + 3729.

It is an arithmetic number, because the mean of its divisors is an integer number (60420).

2⁷⁶⁴⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

764664 is an abundant number, since it is smaller than the sum of its proper divisors (1168776).

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

764664 is a wasteful number, since it uses less digits than its factorization.

764664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 764664 is about 874.4506847158. The cubic root of 764664 is about 91.4443508851. Note that the first 3 decimals are identical.

The spelling of 764664 in words is "seven hundred sixty-four thousand, six hundred sixty-four".