866339 has 4 divisors (see below), whose sum is σ = 868224. Its totient is φ = 864456.

The previous prime is 866329. The next prime is 866353. The reversal of 866339 is 933668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866339 - 2⁸ = 866083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866299 and 866308.

It is not an unprimeable number, because it can be changed into a prime (866309) 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, 254 + ... + 1340.

It is an arithmetic number, because the mean of its divisors is an integer number (217056).

2⁸⁶⁶³³⁹ is an apocalyptic number.

866339 is a deficient number, since it is larger than the sum of its proper divisors (1885).

866339 is a wasteful number, since it uses less digits than its factorization.

866339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884.

The product of its digits is 23328, while the sum is 35.

The square root of 866339 is about 930.7733343838. The cubic root of 866339 is about 95.3299331545.

The spelling of 866339 in words is "eight hundred sixty-six thousand, three hundred thirty-nine".