166891976883 has 16 divisors (see below), whose sum is σ = 260260393600. Its totient is φ = 105405458760.

The previous prime is 166891976869. The next prime is 166891976893. The reversal of 166891976883 is 388679198661.

It is not a de Polignac number, because 166891976883 - 2⁸ = 166891976627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166891976803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162662233 + ... + 162663258.

It is an arithmetic number, because the mean of its divisors is an integer number (16266274600).

Almost surely, 2^166891976883 is an apocalyptic number.

166891976883 is a deficient number, since it is larger than the sum of its proper divisors (93368416717).

166891976883 is a wasteful number, since it uses less digits than its factorization.

166891976883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325325519 (or 325325513 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 72.

The spelling of 166891976883 in words is "one hundred sixty-six billion, eight hundred ninety-one million, nine hundred seventy-six thousand, eight hundred eighty-three".