663564320 has 48 divisors (see below), whose sum is σ = 1569637440. Its totient is φ = 265092864.

The previous prime is 663564311. The next prime is 663564337. The reversal of 663564320 is 23465366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155171 + ... + 159389.

It is an arithmetic number, because the mean of its divisors is an integer number (32700780).

Almost surely, 2^663564320 is an apocalyptic number.

It is an amenable number.

663564320 is an abundant number, since it is smaller than the sum of its proper divisors (906073120).

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

663564320 is a wasteful number, since it uses less digits than its factorization.

663564320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217 (or 5209 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 663564320 is about 25759.7422347352. The cubic root of 663564320 is about 872.2232826080.

The spelling of 663564320 in words is "six hundred sixty-three million, five hundred sixty-four thousand, three hundred twenty".