668796993168 has 40 divisors (see below), whose sum is σ = 1728111688416. Its totient is φ = 222882508800.

The previous prime is 668796993167. The next prime is 668796993169. The reversal of 668796993168 is 861399697866.

It is an interprime number because it is at equal distance from previous prime (668796993167) and next prime (668796993169).

It is a junction number, because it is equal to n+sod(n) for n = 668796993093 and 668796993102.

It is not an unprimeable number, because it can be changed into a prime (668796993167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339618 + ... + 1769793.

Almost surely, 2^668796993168 is an apocalyptic number.

It is an amenable number.

668796993168 is an abundant number, since it is smaller than the sum of its proper divisors (1059314695248).

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

668796993168 is a wasteful number, since it uses less digits than its factorization.

668796993168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113903 (or 3113897 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 78.

The spelling of 668796993168 in words is "six hundred sixty-eight billion, seven hundred ninety-six million, nine hundred ninety-three thousand, one hundred sixty-eight".