800866 has 16 divisors (see below), whose sum is σ = 1334880. Its totient is φ = 357280.

The previous prime is 800861. The next prime is 800873. The reversal of 800866 is 668008.

It is not an unprimeable number, because it can be changed into a prime (800861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (83430).

2⁸⁰⁰⁸⁶⁶ is an apocalyptic number.

800866 is a deficient number, since it is larger than the sum of its proper divisors (534014).

800866 is a wasteful number, since it uses less digits than its factorization.

800866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 800866 is about 894.9111687760. The cubic root of 800866 is about 92.8652613922.

The spelling of 800866 in words is "eight hundred thousand, eight hundred sixty-six".