12686660 has 24 divisors (see below), whose sum is σ = 30448320. Its totient is φ = 4349664.

The previous prime is 12686647. The next prime is 12686747. The reversal of 12686660 is 6668621.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 12686660.

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, 45170 + ... + 45449.

It is an arithmetic number, because the mean of its divisors is an integer number (1268680).

Almost surely, 2^12686660 is an apocalyptic number.

12686660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12686660 is an abundant number, since it is smaller than the sum of its proper divisors (17761660).

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

12686660 is a wasteful number, since it uses less digits than its factorization.

12686660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90635 (or 90633 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 12686660 is about 3561.8337973578. The cubic root of 12686660 is about 233.2289374261.

The spelling of 12686660 in words is "twelve million, six hundred eighty-six thousand, six hundred sixty".