663106866 has 32 divisors (see below), whose sum is σ = 1375228800. Its totient is φ = 212903040.

The previous prime is 663106853. The next prime is 663106877. The reversal of 663106866 is 668601366.

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, 72046 + ... + 80726.

It is an arithmetic number, because the mean of its divisors is an integer number (42975900).

Almost surely, 2^663106866 is an apocalyptic number.

663106866 is an abundant number, since it is smaller than the sum of its proper divisors (712121934).

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

663106866 is a wasteful number, since it uses less digits than its factorization.

663106866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9154.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 663106866 is about 25750.8614613181. The cubic root of 663106866 is about 872.0228027943.

The spelling of 663106866 in words is "six hundred sixty-three million, one hundred six thousand, eight hundred sixty-six".