111165666601 has 16 divisors (see below), whose sum is σ = 121542220800. Its totient is φ = 100834390800.

The previous prime is 111165666587. The next prime is 111165666617. The reversal of 111165666601 is 106666561111.

It is not a de Polignac number, because 111165666601 - 2⁷ = 111165666473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111165666631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23356660 + ... + 23361418.

It is an arithmetic number, because the mean of its divisors is an integer number (7596388800).

Almost surely, 2^111165666601 is an apocalyptic number.

111165666601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111165666601 is a deficient number, since it is larger than the sum of its proper divisors (10376554199).

111165666601 is a wasteful number, since it uses less digits than its factorization.

111165666601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9060.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 111165666601 in words is "one hundred eleven billion, one hundred sixty-five million, six hundred sixty-six thousand, six hundred one".