166866703372 has 6 divisors (see below), whose sum is σ = 292016730908. Its totient is φ = 83433351684.

The previous prime is 166866703271. The next prime is 166866703391. The reversal of 166866703372 is 273307668661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20858337918 + ... + 20858337925.

Almost surely, 2^166866703372 is an apocalyptic number.

It is an amenable number.

166866703372 is a deficient number, since it is larger than the sum of its proper divisors (125150027536).

166866703372 is a wasteful number, since it uses less digits than its factorization.

166866703372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41716675847 (or 41716675845 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 166866703372 in words is "one hundred sixty-six billion, eight hundred sixty-six million, seven hundred three thousand, three hundred seventy-two".