111555566066 has 32 divisors (see below), whose sum is σ = 192487929600. Its totient is φ = 47497798656.

The previous prime is 111555566041. The next prime is 111555566071. The reversal of 111555566066 is 660665555111.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111555566066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1845230 + ... + 1904726.

It is an arithmetic number, because the mean of its divisors is an integer number (6015247800).

Almost surely, 2^111555566066 is an apocalyptic number.

111555566066 is a deficient number, since it is larger than the sum of its proper divisors (80932363534).

111555566066 is a wasteful number, since it uses less digits than its factorization.

111555566066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60378.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 111555566066 in words is "one hundred eleven billion, five hundred fifty-five million, five hundred sixty-six thousand, sixty-six".