166112690 has 16 divisors (see below), whose sum is σ = 300290328. Its totient is φ = 66158976.

The previous prime is 166112677. The next prime is 166112719. The reversal of 166112690 is 96211661.

It can be written as a sum of positive squares in 4 ways, for example, as 156925729 + 9186961 = 12527^2 + 3031^2 .

It is a super-2 number, since 2×166112690² = 55186851558072200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33317 + ... + 37976.

Almost surely, 2^166112690 is an apocalyptic number.

166112690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166112690 is a deficient number, since it is larger than the sum of its proper divisors (134177638).

166112690 is a wasteful number, since it uses less digits than its factorization.

166112690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71533.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 166112690 is about 12888.4712049180. The cubic root of 166112690 is about 549.7108011293.

The spelling of 166112690 in words is "one hundred sixty-six million, one hundred twelve thousand, six hundred ninety".