663552864 has 96 divisors (see below), whose sum is σ = 2084271840. Its totient is φ = 204166656.

The previous prime is 663552853. The next prime is 663552871. The reversal of 663552864 is 468255366.

663552864 is a `hidden beast` number, since 6 + 63 + 5 + 528 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18307 + ... + 40770.

It is an arithmetic number, because the mean of its divisors is an integer number (21711165).

Almost surely, 2^663552864 is an apocalyptic number.

It is an amenable number.

663552864 is an abundant number, since it is smaller than the sum of its proper divisors (1420718976).

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

663552864 is a wasteful number, since it uses less digits than its factorization.

663552864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59109 (or 59095 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 663552864 is about 25759.5198713019. The cubic root of 663552864 is about 872.2182631261.

The spelling of 663552864 in words is "six hundred sixty-three million, five hundred fifty-two thousand, eight hundred sixty-four".