111001666599 has 16 divisors (see below), whose sum is σ = 165629990400. Its totient is φ = 73468726488.

The previous prime is 111001666579. The next prime is 111001666603. The reversal of 111001666599 is 995666100111.

It is not a de Polignac number, because 111001666599 - 2¹³ = 111001658407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001666579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14784639 + ... + 14792144.

It is an arithmetic number, because the mean of its divisors is an integer number (10351874400).

Almost surely, 2^111001666599 is an apocalyptic number.

111001666599 is a deficient number, since it is larger than the sum of its proper divisors (54628323801).

111001666599 is a wasteful number, since it uses less digits than its factorization.

111001666599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29576931 (or 29576925 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The spelling of 111001666599 in words is "one hundred eleven billion, one million, six hundred sixty-six thousand, five hundred ninety-nine".