663476868 has 36 divisors (see below), whose sum is σ = 1677915148. Its totient is φ = 221054400.

The previous prime is 663476857. The next prime is 663476873. The reversal of 663476868 is 868674366.

663476868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 663165504 = 558^2 + 25752^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127518 + ... + 132618.

Almost surely, 2^663476868 is an apocalyptic number.

It is an amenable number.

663476868 is an abundant number, since it is smaller than the sum of its proper divisors (1014438280).

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

663476868 is a wasteful number, since it uses less digits than its factorization.

663476868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8724 (or 8719 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 663476868 is about 25758.0447239304. The cubic root of 663476868 is about 872.1849637798.

The spelling of 663476868 in words is "six hundred sixty-three million, four hundred seventy-six thousand, eight hundred sixty-eight".