866829 has 8 divisors (see below), whose sum is σ = 1160992. Its totient is φ = 575280.

The previous prime is 866819. The next prime is 866843. The reversal of 866829 is 928668.

866829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 866829 - 2⁸ = 866573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866819) 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, 339 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (145124).

2⁸⁶⁶⁸²⁹ is an apocalyptic number.

It is an amenable number.

866829 is a deficient number, since it is larger than the sum of its proper divisors (294163).

866829 is a wasteful number, since it uses less digits than its factorization.

866829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307.

The product of its digits is 41472, while the sum is 39.

The square root of 866829 is about 931.0365191549. The cubic root of 866829 is about 95.3479025880.

The spelling of 866829 in words is "eight hundred sixty-six thousand, eight hundred twenty-nine".