670639764 has 24 divisors (see below), whose sum is σ = 1580961088. Its totient is φ = 221241600.

The previous prime is 670639759. The next prime is 670639799. The reversal of 670639764 is 467936076.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 286912 + ... + 289239.

Almost surely, 2^670639764 is an apocalyptic number.

It is an amenable number.

670639764 is an abundant number, since it is smaller than the sum of its proper divisors (910321324).

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

670639764 is a wasteful number, since it uses less digits than its factorization.

670639764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576255 (or 576253 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 48.

The square root of 670639764 is about 25896.7133822035. The cubic root of 670639764 is about 875.3124387363.

The spelling of 670639764 in words is "six hundred seventy million, six hundred thirty-nine thousand, seven hundred sixty-four".