866804 has 12 divisors (see below), whose sum is σ = 1528800. Its totient is φ = 430008.

The previous prime is 866783. The next prime is 866819. The reversal of 866804 is 408668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 1335.

It is an arithmetic number, because the mean of its divisors is an integer number (127400).

2⁸⁶⁶⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

866804 is a deficient number, since it is larger than the sum of its proper divisors (661996).

866804 is a wasteful number, since it uses less digits than its factorization.

866804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1700 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 866804 is about 931.0230931615. The cubic root of 866804 is about 95.3469859442.

The spelling of 866804 in words is "eight hundred sixty-six thousand, eight hundred four".