117171666 has 12 divisors (see below), whose sum is σ = 253871982. Its totient is φ = 39057216.

The previous prime is 117171653. The next prime is 117171671. The reversal of 117171666 is 666171711.

It can be written as a sum of positive squares in only one way, i.e., 60606225 + 56565441 = 7785^2 + 7521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 117171666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3254751 + ... + 3254786.

Almost surely, 2^117171666 is an apocalyptic number.

117171666 is an abundant number, since it is smaller than the sum of its proper divisors (136700316).

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

117171666 is a wasteful number, since it uses less digits than its factorization.

117171666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6509545 (or 6509542 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 117171666 is about 10824.5861814667. The cubic root of 117171666 is about 489.3364139705.

The spelling of 117171666 in words is "one hundred seventeen million, one hundred seventy-one thousand, six hundred sixty-six".