664623308 has 12 divisors (see below), whose sum is σ = 1190139720. Its totient is φ = 324583392.

The previous prime is 664623277. The next prime is 664623319. The reversal of 664623308 is 803326466.

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, 1931873 + ... + 1932216.

It is an arithmetic number, because the mean of its divisors is an integer number (99178310).

Almost surely, 2^664623308 is an apocalyptic number.

It is an amenable number.

664623308 is a deficient number, since it is larger than the sum of its proper divisors (525516412).

664623308 is a wasteful number, since it uses less digits than its factorization.

664623308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3864136 (or 3864134 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 664623308 is about 25780.2891372459. The cubic root of 664623308 is about 872.6870322052.

The spelling of 664623308 in words is "six hundred sixty-four million, six hundred twenty-three thousand, three hundred eight".