668893376972 has 24 divisors (see below), whose sum is σ = 1172530449552. Its totient is φ = 333885153600.

The previous prime is 668893376971. The next prime is 668893377011. The reversal of 668893376972 is 279673398866.

It is a self number, because there is not a number n which added to its sum of digits gives 668893376972.

It is not an unprimeable number, because it can be changed into a prime (668893376971) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5671847 + ... + 5788577.

It is an arithmetic number, because the mean of its divisors is an integer number (48855435398).

Almost surely, 2^668893376972 is an apocalyptic number.

It is an amenable number.

668893376972 is a deficient number, since it is larger than the sum of its proper divisors (503637072580).

668893376972 is a wasteful number, since it uses less digits than its factorization.

668893376972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119129 (or 119127 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 74.

The spelling of 668893376972 in words is "six hundred sixty-eight billion, eight hundred ninety-three million, three hundred seventy-six thousand, nine hundred seventy-two".