117655566 has 48 divisors (see below), whose sum is σ = 275241600. Its totient is φ = 33430320.

The previous prime is 117655553. The next prime is 117655567. The reversal of 117655566 is 665556711.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117655567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57501 + ... + 59511.

It is an arithmetic number, because the mean of its divisors is an integer number (5734200).

Almost surely, 2^117655566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117655566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137620800).

117655566 is an abundant number, since it is smaller than the sum of its proper divisors (157586034).

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

117655566 is a wasteful number, since it uses less digits than its factorization.

117655566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229 (or 2222 counting only the distinct ones).

The product of its digits is 189000, while the sum is 42.

The square root of 117655566 is about 10846.9150453021. The cubic root of 117655566 is about 490.0091154767.

The spelling of 117655566 in words is "one hundred seventeen million, six hundred fifty-five thousand, five hundred sixty-six".