866079 has 8 divisors (see below), whose sum is σ = 1283120. Its totient is φ = 577368.

The previous prime is 866057. The next prime is 866081. The reversal of 866079 is 970668.

It is a de Polignac number, because none of the positive numbers 2^k-866079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16012 + ... + 16065.

It is an arithmetic number, because the mean of its divisors is an integer number (160390).

2⁸⁶⁶⁰⁷⁹ is an apocalyptic number.

866079 is a deficient number, since it is larger than the sum of its proper divisors (417041).

866079 is a wasteful number, since it uses less digits than its factorization.

866079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32086 (or 32080 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 866079 is about 930.6336550974. The cubic root of 866079 is about 95.3203956014.

The spelling of 866079 in words is "eight hundred sixty-six thousand, seventy-nine".