111665106161 has 8 divisors (see below), whose sum is σ = 128809949760. Its totient is φ = 94818433968.

The previous prime is 111665106127. The next prime is 111665106167. The reversal of 111665106161 is 161601566111.

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-111665106161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111665106167) 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, 74542046 + ... + 74543543.

It is an arithmetic number, because the mean of its divisors is an integer number (16101243720).

Almost surely, 2^111665106161 is an apocalyptic number.

It is an amenable number.

111665106161 is a deficient number, since it is larger than the sum of its proper divisors (17144843599).

111665106161 is a wasteful number, since it uses less digits than its factorization.

111665106161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149085703.

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 111665106161 in words is "one hundred eleven billion, six hundred sixty-five million, one hundred six thousand, one hundred sixty-one".