66866 has 8 divisors (see below), whose sum is σ = 102000. Its totient is φ = 32868.

The previous prime is 66863. The next prime is 66877.

It is a happy number.

66866 is nontrivially palindromic in base 10.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116 + ... + 383.

It is an arithmetic number, because the mean of its divisors is an integer number (12750).

2⁶⁶⁸⁶⁶ is an apocalyptic number.

66866 is a deficient number, since it is larger than the sum of its proper divisors (35134).

66866 is a wasteful number, since it uses less digits than its factorization.

66866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568.

The product of its digits is 10368, while the sum is 32.

The square root of 66866 is about 258.5846089774. The cubic root of 66866 is about 40.5883859457.

The spelling of 66866 in words is "sixty-six thousand, eight hundred sixty-six".