111111099966 has 12 divisors (see below), whose sum is σ = 240740716632. Its totient is φ = 37037033316.

The previous prime is 111111099919. The next prime is 111111099971. The reversal of 111111099966 is 669990111111.

111111099966 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3086419426 + ... + 3086419461.

It is an arithmetic number, because the mean of its divisors is an integer number (20061726386).

Almost surely, 2^111111099966 is an apocalyptic number.

111111099966 is an abundant number, since it is smaller than the sum of its proper divisors (129629616666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111111099966 is a wasteful number, since it uses less digits than its factorization.

111111099966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172838895 (or 6172838892 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 45.

The spelling of 111111099966 in words is "one hundred eleven billion, one hundred eleven million, ninety-nine thousand, nine hundred sixty-six".