13866 has 8 divisors (see below), whose sum is σ = 27744. Its totient is φ = 4620.

The previous prime is 13859. The next prime is 13873. The reversal of 13866 is 66831.

13866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13859) and next prime (13873).

It is a sphenic number, since it is the product of 3 distinct primes.

13866 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (3468).

2¹³⁸⁶⁶ is an apocalyptic number.

13866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13872).

13866 is a wasteful number, since it uses less digits than its factorization.

13866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 864, while the sum is 24.

The square root of 13866 is about 117.7539808244. The cubic root of 13866 is about 24.0242809820.

The spelling of 13866 in words is "thirteen thousand, eight hundred sixty-six".