117666138 has 8 divisors (see below), whose sum is σ = 235332288. Its totient is φ = 39222044.

The previous prime is 117666127. The next prime is 117666161. The reversal of 117666138 is 831666711.

It is a sphenic number, since it is the product of 3 distinct primes.

117666138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 117666096 and 117666105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9805506 + ... + 9805517.

It is an arithmetic number, because the mean of its divisors is an integer number (29416536).

Almost surely, 2^117666138 is an apocalyptic number.

117666138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

117666138 is a wasteful number, since it uses less digits than its factorization.

117666138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19611028.

The product of its digits is 36288, while the sum is 39.

The square root of 117666138 is about 10847.4023618560. The cubic root of 117666138 is about 490.0237917089.

The spelling of 117666138 in words is "one hundred seventeen million, six hundred sixty-six thousand, one hundred thirty-eight".