866979 has 6 divisors (see below), whose sum is σ = 1252316. Its totient is φ = 577980.

The previous prime is 866969. The next prime is 867001. The reversal of 866979 is 979668.

It is not a de Polignac number, because 866979 - 2⁴ = 866963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48157 + ... + 48174.

2⁸⁶⁶⁹⁷⁹ is an apocalyptic number.

866979 is a deficient number, since it is larger than the sum of its proper divisors (385337).

866979 is a wasteful number, since it uses less digits than its factorization.

866979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96337 (or 96334 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 866979 is about 931.1170710496. The cubic root of 866979 is about 95.3534020812.

The spelling of 866979 in words is "eight hundred sixty-six thousand, nine hundred seventy-nine".