166939671 has 8 divisors (see below), whose sum is σ = 228602224. Its totient is φ = 108285120.

The previous prime is 166939657. The next prime is 166939693. The reversal of 166939671 is 176939661.

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

It is not a de Polignac number, because 166939671 - 2¹⁹ = 166415383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166939671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166939601) 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, 751870 + ... + 752091.

It is an arithmetic number, because the mean of its divisors is an integer number (28575278).

Almost surely, 2^166939671 is an apocalyptic number.

166939671 is a deficient number, since it is larger than the sum of its proper divisors (61662553).

166939671 is a wasteful number, since it uses less digits than its factorization.

166939671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504001.

The product of its digits is 367416, while the sum is 48.

The square root of 166939671 is about 12920.5135733840. The cubic root of 166939671 is about 550.6215243826.

The spelling of 166939671 in words is "one hundred sixty-six million, nine hundred thirty-nine thousand, six hundred seventy-one".