668988244 has 12 divisors (see below), whose sum is σ = 1170982624. Its totient is φ = 334421784.

The previous prime is 668988227. The next prime is 668988253. The reversal of 668988244 is 442889866.

It is a super-2 number, since 2×668988244² = 895090541220407072, which contains 22 as substring.

It is a congruent number.

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, 6409 + ... + 37135.

Almost surely, 2^668988244 is an apocalyptic number.

It is an amenable number.

668988244 is a deficient number, since it is larger than the sum of its proper divisors (501994380).

668988244 is a wasteful number, since it uses less digits than its factorization.

668988244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36174 (or 36172 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The square root of 668988244 is about 25864.8070551473. The cubic root of 668988244 is about 874.5933322224.

The spelling of 668988244 in words is "six hundred sixty-eight million, nine hundred eighty-eight thousand, two hundred forty-four".