664222808 has 16 divisors (see below), whose sum is σ = 1245976560. Its totient is φ = 331962400.

The previous prime is 664222799. The next prime is 664222813. The reversal of 664222808 is 808222466.

It is a congruent number.

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, 1613 + ... + 36483.

It is an arithmetic number, because the mean of its divisors is an integer number (77873535).

Almost surely, 2^664222808 is an apocalyptic number.

It is an amenable number.

664222808 is a deficient number, since it is larger than the sum of its proper divisors (581753752).

664222808 is a wasteful number, since it uses less digits than its factorization.

664222808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37258 (or 37254 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 664222808 is about 25772.5204044928. The cubic root of 664222808 is about 872.5117041257.

The spelling of 664222808 in words is "six hundred sixty-four million, two hundred twenty-two thousand, eight hundred eight".