18716660 has 24 divisors (see below), whose sum is σ = 41617800. Its totient is φ = 7046144.

The previous prime is 18716647. The next prime is 18716671. The reversal of 18716660 is 6661781.

It can be written as a sum of positive squares in 4 ways, for example, as 7997584 + 10719076 = 2828^2 + 3274^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18716660.

It is a congruent number.

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, 27185 + ... + 27864.

It is an arithmetic number, because the mean of its divisors is an integer number (1734075).

Almost surely, 2^18716660 is an apocalyptic number.

18716660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18716660 is an abundant number, since it is smaller than the sum of its proper divisors (22901140).

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

18716660 is a wasteful number, since it uses less digits than its factorization.

18716660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55075 (or 55073 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 18716660 is about 4326.2755344522. The cubic root of 18716660 is about 265.5070864883.

The spelling of 18716660 in words is "eighteen million, seven hundred sixteen thousand, six hundred sixty".