111687660 has 288 divisors, whose sum is σ = 415833600. Its totient is φ = 25147584.

The previous prime is 111687647. The next prime is 111687661. The reversal of 111687660 is 66786111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (111687661) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1666947 + ... + 1667013.

Almost surely, 2^111687660 is an apocalyptic number.

111687660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111687660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207916800).

111687660 is an abundant number, since it is smaller than the sum of its proper divisors (304145940).

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

111687660 is an equidigital number, since it uses as much as digits as its factorization.

111687660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 111687660 is about 10568.2382637789. The cubic root of 111687660 is about 481.5799500396.

The spelling of 111687660 in words is "one hundred eleven million, six hundred eighty-seven thousand, six hundred sixty".