166118031 has 12 divisors (see below), whose sum is σ = 240118008. Its totient is φ = 110667024.

The previous prime is 166118021. The next prime is 166118047. The reversal of 166118031 is 130811661.

166118031 is a `hidden beast` number, since 16 + 611 + 8 + 0 + 31 = 666.

It is not a de Polignac number, because 166118031 - 2¹⁷ = 165986959 is a prime.

It is a super-2 number, since 2×166118031² = 55190400446633922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 166117986 and 166118004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166118011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8796 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (20009834).

Almost surely, 2^166118031 is an apocalyptic number.

166118031 is a deficient number, since it is larger than the sum of its proper divisors (73999977).

166118031 is a wasteful number, since it uses less digits than its factorization.

166118031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13062 (or 13059 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 166118031 is about 12888.6784039327. The cubic root of 166118031 is about 549.7166926597.

Adding to 166118031 its reverse (130811661), we get a palindrome (296929692).

It can be divided in two parts, 16611 and 8031, that added together give a palindrome (24642).

The spelling of 166118031 in words is "one hundred sixty-six million, one hundred eighteen thousand, thirty-one".