13666860 has 48 divisors (see below), whose sum is σ = 42520800. Its totient is φ = 3644352.

The previous prime is 13666847. The next prime is 13666879. The reversal of 13666860 is 6866631.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12115 + ... + 13194.

It is an arithmetic number, because the mean of its divisors is an integer number (885850).

Almost surely, 2^13666860 is an apocalyptic number.

13666860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13666860 is an abundant number, since it is smaller than the sum of its proper divisors (28853940).

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

13666860 is a wasteful number, since it uses less digits than its factorization.

13666860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25327 (or 25319 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 13666860 is about 3696.8716504634. The cubic root of 13666860 is about 239.0871573952.

The spelling of 13666860 in words is "thirteen million, six hundred sixty-six thousand, eight hundred sixty".