667706872168 has 32 divisors (see below), whose sum is σ = 1430851498560. Its totient is φ = 286149876480.

The previous prime is 667706872141. The next prime is 667706872181. The reversal of 667706872168 is 861278607766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491355 + ... + 1886677.

It is an arithmetic number, because the mean of its divisors is an integer number (44714109330).

Almost surely, 2^667706872168 is an apocalyptic number.

It is an amenable number.

667706872168 is an abundant number, since it is smaller than the sum of its proper divisors (763144626392).

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

667706872168 is a wasteful number, since it uses less digits than its factorization.

667706872168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425497 (or 425493 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 667706872168 in words is "six hundred sixty-seven billion, seven hundred six million, eight hundred seventy-two thousand, one hundred sixty-eight".