668990144176 has 20 divisors (see below), whose sum is σ = 1296182498832. Its totient is φ = 334491434816.

The previous prime is 668990144149. The next prime is 668990144201. The reversal of 668990144176 is 671441099866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1884621 + ... + 2211283.

Almost surely, 2^668990144176 is an apocalyptic number.

It is an amenable number.

668990144176 is a deficient number, since it is larger than the sum of its proper divisors (627192354656).

668990144176 is a wasteful number, since it uses less digits than its factorization.

668990144176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454668 (or 454662 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 668990144176 in words is "six hundred sixty-eight billion, nine hundred ninety million, one hundred forty-four thousand, one hundred seventy-six".