8666 has 8 divisors (see below), whose sum is σ = 14880. Its totient is φ = 3708.

The previous prime is 8663. The next prime is 8669. The reversal of 8666 is 6668.

8666 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 (8663) and next prime (8669).

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

It is an Ulam number.

8666 is a modest number, since divided by 666 gives 8 as remainder.

It is a Curzon number.

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (8663) by changing a digit.

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, 296 + ... + 323.

It is an arithmetic number, because the mean of its divisors is an integer number (1860).

2⁸⁶⁶⁶ is an apocalyptic number.

8666 is a deficient number, since it is larger than the sum of its proper divisors (6214).

8666 is a wasteful number, since it uses less digits than its factorization.

8666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628.

The product of its digits is 1728, while the sum is 26.

The square root of 8666 is about 93.0913529819. The cubic root of 8666 is about 20.5402737918.

The spelling of 8666 in words is "eight thousand, six hundred sixty-six".