18166680 has 224 divisors, whose sum is σ = 70826400. Its totient is φ = 4105728.

The previous prime is 18166669. The next prime is 18166697. The reversal of 18166680 is 8666181.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 204076 + ... + 204164.

Almost surely, 2^18166680 is an apocalyptic number.

18166680 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 18166680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35413200).

18166680 is an abundant number, since it is smaller than the sum of its proper divisors (52659720).

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

18166680 is an equidigital number, since it uses as much as digits as its factorization.

18166680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18166680 is about 4262.2388483050. The cubic root of 18166680 is about 262.8805907834.

The spelling of 18166680 in words is "eighteen million, one hundred sixty-six thousand, six hundred eighty".