111560661 has 48 divisors (see below), whose sum is σ = 174140928. Its totient is φ = 68688000.

The previous prime is 111560627. The next prime is 111560663. The reversal of 111560661 is 166065111.

It is not a de Polignac number, because 111560661 - 2⁶ = 111560597 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111560663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1042570 + ... + 1042676.

It is an arithmetic number, because the mean of its divisors is an integer number (3627936).

Almost surely, 2^111560661 is an apocalyptic number.

It is an amenable number.

111560661 is a deficient number, since it is larger than the sum of its proper divisors (62580267).

111560661 is a wasteful number, since it uses less digits than its factorization.

111560661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 111560661 is about 10562.2280320016. The cubic root of 111560661 is about 481.3973474487.

It can be divided in two parts, 1115 and 60661, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 111560661 in words is "one hundred eleven million, five hundred sixty thousand, six hundred sixty-one".