117666 has 16 divisors (see below), whose sum is σ = 261600. Its totient is φ = 39204.

The previous prime is 117659. The next prime is 117671. The reversal of 117666 is 666711.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1036 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (16350).

117666 is a Friedman number, since it can be written as 17+(6+1^6)^6, using all its digits and the basic arithmetic operations.

2¹¹⁷⁶⁶⁶ is an apocalyptic number.

117666 is an abundant number, since it is smaller than the sum of its proper divisors (143934).

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

117666 is a wasteful number, since it uses less digits than its factorization.

117666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190 (or 2184 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 117666 is about 343.0247804460. The cubic root of 117666 is about 49.0023600141.

The spelling of 117666 in words is "one hundred seventeen thousand, six hundred sixty-six".