663902563889960 has 64 divisors (see below), whose sum is σ = 1522855895270400. Its totient is φ = 260418419078400.

The previous prime is 663902563889951. The next prime is 663902563890029. The reversal of 663902563889960 is 69988365209366.

It is a super-2 number, since 2×663902563889960² (a number of 30 digits) contains 22 as substring.

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, 410206280 + ... + 411821559.

It is an arithmetic number, because the mean of its divisors is an integer number (23794623363600).

Almost surely, 2^{663902563889960} is an apocalyptic number.

It is an amenable number.

663902563889960 is an abundant number, since it is smaller than the sum of its proper divisors (858953331380440).

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

663902563889960 is a wasteful number, since it uses less digits than its factorization.

663902563889960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822028242 (or 822028238 counting only the distinct ones).

The product of its (nonzero) digits is 5441955840, while the sum is 80.

The spelling of 663902563889960 in words is "six hundred sixty-three trillion, nine hundred two billion, five hundred sixty-three million, eight hundred eighty-nine thousand, nine hundred sixty".