664608312 has 48 divisors (see below), whose sum is σ = 1862055000. Its totient is φ = 213896256.

The previous prime is 664608311. The next prime is 664608323. The reversal of 664608312 is 213806466.

664608312 is a `hidden beast` number, since 6 + 646 + 0 + 8 + 3 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664608311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157062 + ... + 161237.

Almost surely, 2^664608312 is an apocalyptic number.

It is an amenable number.

664608312 is an abundant number, since it is smaller than the sum of its proper divisors (1197446688).

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

664608312 is a wasteful number, since it uses less digits than its factorization.

664608312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318340 (or 318333 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 664608312 is about 25779.9982932505. The cubic root of 664608312 is about 872.6804686311.

The spelling of 664608312 in words is "six hundred sixty-four million, six hundred eight thousand, three hundred twelve".