111661560166 has 48 divisors (see below), whose sum is σ = 190833548976. Its totient is φ = 48700986048.

The previous prime is 111661560163. The next prime is 111661560169. The reversal of 111661560166 is 661065166111.

It is an interprime number because it is at equal distance from previous prime (111661560163) and next prime (111661560169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111661560163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1092676 + ... + 1190488.

It is an arithmetic number, because the mean of its divisors is an integer number (3975698937).

Almost surely, 2^111661560166 is an apocalyptic number.

111661560166 is a deficient number, since it is larger than the sum of its proper divisors (79171988810).

111661560166 is a wasteful number, since it uses less digits than its factorization.

111661560166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97957 (or 97934 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 111661560166 in words is "one hundred eleven billion, six hundred sixty-one million, five hundred sixty thousand, one hundred sixty-six".