117156665 has 16 divisors (see below), whose sum is σ = 148538880. Its totient is φ = 88562880.

The previous prime is 117156649. The next prime is 117156671. The reversal of 117156665 is 566651711.

It is not a de Polignac number, because 117156665 - 2⁴ = 117156649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1781 + ... + 15410.

It is an arithmetic number, because the mean of its divisors is an integer number (9283680).

Almost surely, 2^117156665 is an apocalyptic number.

It is an amenable number.

117156665 is a deficient number, since it is larger than the sum of its proper divisors (31382215).

117156665 is a wasteful number, since it uses less digits than its factorization.

117156665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17272.

The product of its digits is 37800, while the sum is 38.

The square root of 117156665 is about 10823.8932459628. The cubic root of 117156665 is about 489.3155305122.

The spelling of 117156665 in words is "one hundred seventeen million, one hundred fifty-six thousand, six hundred sixty-five".