866726 has 8 divisors (see below), whose sum is σ = 1485840. Its totient is φ = 371448.

The previous prime is 866717. The next prime is 866737. The reversal of 866726 is 627668.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866726.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30941 + ... + 30968.

It is an arithmetic number, because the mean of its divisors is an integer number (185730).

2⁸⁶⁶⁷²⁶ is an apocalyptic number.

866726 is a deficient number, since it is larger than the sum of its proper divisors (619114).

866726 is a wasteful number, since it uses less digits than its factorization.

866726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61918.

The product of its digits is 24192, while the sum is 35.

The square root of 866726 is about 930.9812028178. The cubic root of 866726 is about 95.3441259020.

Adding to 866726 its sum of digits (35), we get a square (866761 = 931²).

The spelling of 866726 in words is "eight hundred sixty-six thousand, seven hundred twenty-six".