166858131 has 16 divisors (see below), whose sum is σ = 247868928. Its totient is φ = 98973600.

The previous prime is 166858129. The next prime is 166858147. The reversal of 166858131 is 131858661.

166858131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166858131 - 2¹ = 166858129 is a prime.

It is a super-2 number, since 2×166858131² = 55683271761626322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166858131.

It is not an unprimeable number, because it can be changed into a prime (166858121) 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, 52240 + ... + 55341.

It is an arithmetic number, because the mean of its divisors is an integer number (15491808).

Almost surely, 2^166858131 is an apocalyptic number.

166858131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166858131 is a deficient number, since it is larger than the sum of its proper divisors (81010797).

166858131 is a wasteful number, since it uses less digits than its factorization.

166858131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107642.

The product of its digits is 34560, while the sum is 39.

The square root of 166858131 is about 12917.3577406527. The cubic root of 166858131 is about 550.5318612710.

The spelling of 166858131 in words is "one hundred sixty-six million, eight hundred fifty-eight thousand, one hundred thirty-one".