13800666 has 32 divisors (see below), whose sum is σ = 30283776. Its totient is φ = 4158000.

The previous prime is 13800653. The next prime is 13800671. The reversal of 13800666 is 66600831.

13800666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 13431 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (946368).

Almost surely, 2^13800666 is an apocalyptic number.

13800666 is an abundant number, since it is smaller than the sum of its proper divisors (16483110).

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

13800666 is a wasteful number, since it uses less digits than its factorization.

13800666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 13800666 is about 3714.9247637065. The cubic root of 13800666 is about 239.8648892299.

The spelling of 13800666 in words is "thirteen million, eight hundred thousand, six hundred sixty-six".