111665216634606 has 24 divisors (see below), whose sum is σ = 243208011106944. Its totient is φ = 37026860663040.

The previous prime is 111665216634593. The next prime is 111665216634683. The reversal of 111665216634606 is 606436612566111.

111665216634606 is a `hidden beast` number, since 1 + 1 + 1 + 6 + 6 + 5 + 21 + 6 + 6 + 3 + 4 + 606 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16239847731 + ... + 16239854606.

It is an arithmetic number, because the mean of its divisors is an integer number (10133667129456).

Almost surely, 2^{111665216634606} is an apocalyptic number.

111665216634606 is an abundant number, since it is smaller than the sum of its proper divisors (131542794472338).

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

111665216634606 is a wasteful number, since it uses less digits than its factorization.

111665216634606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32479702536 (or 32479702533 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 111665216634606 in words is "one hundred eleven trillion, six hundred sixty-five billion, two hundred sixteen million, six hundred thirty-four thousand, six hundred six".