663660364 has 12 divisors (see below), whose sum is σ = 1175399064. Its totient is φ = 327832064.

The previous prime is 663660353. The next prime is 663660373. The reversal of 663660364 is 463066366.

It is a super-2 number, since 2×663660364² = 880890157489224992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999157 + ... + 999820.

It is an arithmetic number, because the mean of its divisors is an integer number (97949922).

Almost surely, 2^663660364 is an apocalyptic number.

It is an amenable number.

663660364 is a deficient number, since it is larger than the sum of its proper divisors (511738700).

663660364 is a wasteful number, since it uses less digits than its factorization.

663660364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999064 (or 1999062 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 40.

The square root of 663660364 is about 25761.6063940120. The cubic root of 663660364 is about 872.2653623126.

The spelling of 663660364 in words is "six hundred sixty-three million, six hundred sixty thousand, three hundred sixty-four".