866673 has 8 divisors (see below), whose sum is σ = 1284000. Its totient is φ = 577764.

The previous prime is 866653. The next prime is 866683. The reversal of 866673 is 376668.

It is a happy number.

It is not a de Polignac number, because 866673 - 2⁵ = 866641 is a prime.

It is a super-2 number, since 2×866673² = 1502244177858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866623) 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 7 ways as a sum of consecutive naturals, for example, 16023 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (160500).

2⁸⁶⁶⁶⁷³ is an apocalyptic number.

It is an amenable number.

866673 is a deficient number, since it is larger than the sum of its proper divisors (417327).

866673 is a wasteful number, since it uses less digits than its factorization.

866673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32108 (or 32102 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 866673 is about 930.9527377907. The cubic root of 866673 is about 95.3421824421.

The spelling of 866673 in words is "eight hundred sixty-six thousand, six hundred seventy-three".