166131374843 has 16 divisors (see below), whose sum is σ = 190568964864. Its totient is φ = 141870601440.

The previous prime is 166131374839. The next prime is 166131374863. The reversal of 166131374843 is 348473131661.

It is a cyclic number.

It is not a de Polignac number, because 166131374843 - 2² = 166131374839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166131374863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2977028 + ... + 3032318.

It is an arithmetic number, because the mean of its divisors is an integer number (11910560304).

Almost surely, 2^166131374843 is an apocalyptic number.

166131374843 is a deficient number, since it is larger than the sum of its proper divisors (24437590021).

166131374843 is a wasteful number, since it uses less digits than its factorization.

166131374843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56882.

The product of its digits is 870912, while the sum is 47.

The spelling of 166131374843 in words is "one hundred sixty-six billion, one hundred thirty-one million, three hundred seventy-four thousand, eight hundred forty-three".