111666105607 has 16 divisors (see below), whose sum is σ = 134608838400. Its totient is φ = 90491506560.

The previous prime is 111666105559. The next prime is 111666105653. The reversal of 111666105607 is 706501666111.

It is not a de Polignac number, because 111666105607 - 2³¹ = 109518621959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111666105607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111666105007) 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, 789682 + ... + 920287.

It is an arithmetic number, because the mean of its divisors is an integer number (8413052400).

Almost surely, 2^111666105607 is an apocalyptic number.

111666105607 is a deficient number, since it is larger than the sum of its proper divisors (22942732793).

111666105607 is a wasteful number, since it uses less digits than its factorization.

111666105607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710486.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 111666105607 in words is "one hundred eleven billion, six hundred sixty-six million, one hundred five thousand, six hundred seven".