663511056 has 40 divisors (see below), whose sum is σ = 1845923520. Its totient is φ = 204157056.

The previous prime is 663511031. The next prime is 663511087. The reversal of 663511056 is 650115366.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531036 + ... + 532283.

It is an arithmetic number, because the mean of its divisors is an integer number (46148088).

Almost surely, 2^663511056 is an apocalyptic number.

It is an amenable number.

663511056 is an abundant number, since it is smaller than the sum of its proper divisors (1182412464).

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

663511056 is a wasteful number, since it uses less digits than its factorization.

663511056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063343 (or 1063337 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 663511056 is about 25758.7083527105. The cubic root of 663511056 is about 872.1999443309.

The spelling of 663511056 in words is "six hundred sixty-three million, five hundred eleven thousand, fifty-six".