166790172239 has 8 divisors (see below), whose sum is σ = 167288772672. Its totient is φ = 166292169120.

The previous prime is 166790172187. The next prime is 166790172253. The reversal of 166790172239 is 932271097661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166790172239 - 2³² = 162495204943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166795172239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413129 + ... + 710109.

It is an arithmetic number, because the mean of its divisors is an integer number (20911096584).

Almost surely, 2^166790172239 is an apocalyptic number.

166790172239 is a deficient number, since it is larger than the sum of its proper divisors (498600433).

166790172239 is a wasteful number, since it uses less digits than its factorization.

166790172239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298657.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 166790172239 in words is "one hundred sixty-six billion, seven hundred ninety million, one hundred seventy-two thousand, two hundred thirty-nine".