111566551660 has 24 divisors (see below), whose sum is σ = 234645309360. Its totient is φ = 44558896704.

The previous prime is 111566551637. The next prime is 111566551673. The reversal of 111566551660 is 66155665111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4219239 + ... + 4245598.

It is an arithmetic number, because the mean of its divisors is an integer number (9776887890).

Almost surely, 2^111566551660 is an apocalyptic number.

111566551660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111566551660 is an abundant number, since it is smaller than the sum of its proper divisors (123078757700).

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

111566551660 is a wasteful number, since it uses less digits than its factorization.

111566551660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8465505 (or 8465503 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 111566551660 in words is "one hundred eleven billion, five hundred sixty-six million, five hundred fifty-one thousand, six hundred sixty".