117665856 has 252 divisors, whose sum is σ = 429127920. Its totient is φ = 30481920.

The previous prime is 117665837. The next prime is 117665927. The reversal of 117665856 is 658566711.

117665856 is a `hidden beast` number, since 1 + 1 + 7 + 66 + 585 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 310275 + ... + 310653.

Almost surely, 2^117665856 is an apocalyptic number.

117665856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117665856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214563960).

117665856 is an abundant number, since it is smaller than the sum of its proper divisors (311462064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117665856 is a wasteful number, since it uses less digits than its factorization.

117665856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 402 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 117665856 is about 10847.3893633445. The cubic root of 117665856 is about 490.0234002430.

The spelling of 117665856 in words is "one hundred seventeen million, six hundred sixty-five thousand, eight hundred fifty-six".