111665166166 has 8 divisors (see below), whose sum is σ = 167534199360. Its totient is φ = 55820433048.

The previous prime is 111665166163. The next prime is 111665166169. The reversal of 111665166166 is 661661566111.

It is an interprime number because it is at equal distance from previous prime (111665166163) and next prime (111665166169).

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

It is a super-2 number, since 2×111665166166² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111665166161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6063526 + ... + 6081913.

It is an arithmetic number, because the mean of its divisors is an integer number (20941774920).

Almost surely, 2^111665166166 is an apocalyptic number.

111665166166 is a deficient number, since it is larger than the sum of its proper divisors (55869033194).

111665166166 is a wasteful number, since it uses less digits than its factorization.

111665166166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12150038.

The product of its digits is 233280, while the sum is 46.

The spelling of 111665166166 in words is "one hundred eleven billion, six hundred sixty-five million, one hundred sixty-six thousand, one hundred sixty-six".