117508661 has 8 divisors (see below), whose sum is σ = 119133504. Its totient is φ = 115888960.

The previous prime is 117508627. The next prime is 117508733. The reversal of 117508661 is 166805711.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117508661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117508961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72320 + ... + 73926.

It is an arithmetic number, because the mean of its divisors is an integer number (14891688).

Almost surely, 2^117508661 is an apocalyptic number.

It is an amenable number.

117508661 is a deficient number, since it is larger than the sum of its proper divisors (1624843).

117508661 is an equidigital number, since it uses as much as digits as its factorization.

117508661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 117508661 is about 10840.1411891174. The cubic root of 117508661 is about 489.8050883817.

The spelling of 117508661 in words is "one hundred seventeen million, five hundred eight thousand, six hundred sixty-one".