166861174371 has 32 divisors (see below), whose sum is σ = 230900544000. Its totient is φ = 107056793088.

The previous prime is 166861174327. The next prime is 166861174373. The reversal of 166861174371 is 173471168661.

It is not a de Polignac number, because 166861174371 - 2²³ = 166852785763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166861174373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44152960 + ... + 44156738.

It is an arithmetic number, because the mean of its divisors is an integer number (7215642000).

Almost surely, 2^166861174371 is an apocalyptic number.

166861174371 is a deficient number, since it is larger than the sum of its proper divisors (64039369629).

166861174371 is a wasteful number, since it uses less digits than its factorization.

166861174371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5323.

The product of its digits is 1016064, while the sum is 51.

The spelling of 166861174371 in words is "one hundred sixty-six billion, eight hundred sixty-one million, one hundred seventy-four thousand, three hundred seventy-one".