166788251730875 has 32 divisors (see below), whose sum is σ = 209180157466176. Its totient is φ = 132771984979200.

The previous prime is 166788251730809. The next prime is 166788251730901. The reversal of 166788251730875 is 578037152887661.

It is a de Polignac number, because none of the positive numbers 2^k-166788251730875 is a prime.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51694079 + ... + 54825671.

It is an arithmetic number, because the mean of its divisors is an integer number (6536879920818).

Almost surely, 2^{166788251730875} is an apocalyptic number.

166788251730875 is a deficient number, since it is larger than the sum of its proper divisors (42391905735301).

166788251730875 is a wasteful number, since it uses less digits than its factorization.

166788251730875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133712 (or 3133702 counting only the distinct ones).

The product of its (nonzero) digits is 948326400, while the sum is 74.

The spelling of 166788251730875 in words is "one hundred sixty-six trillion, seven hundred eighty-eight billion, two hundred fifty-one million, seven hundred thirty thousand, eight hundred seventy-five".