18066 has 8 divisors (see below), whose sum is σ = 36144. Its totient is φ = 6020.

The previous prime is 18061. The next prime is 18077. The reversal of 18066 is 66081.

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

18066 is an admirable number.

It is a nialpdrome in base 8.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18066.

It is not an unprimeable number, because it can be changed into a prime (18061) by changing a digit.

18066 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500 + ... + 1511.

It is an arithmetic number, because the mean of its divisors is an integer number (4518).

2¹⁸⁰⁶⁶ is an apocalyptic number.

18066 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 (18072).

18066 is a wasteful number, since it uses less digits than its factorization.

18066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18066 is about 134.4098210697. The cubic root of 18066 is about 26.2394061560.

The spelling of 18066 in words is "eighteen thousand, sixty-six".