679866 has 16 divisors (see below), whose sum is σ = 1483488. Its totient is φ = 206000.

The previous prime is 679859. The next prime is 679867. The reversal of 679866 is 668976.

It is a happy 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 (679867) 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, 5085 + ... + 5216.

It is an arithmetic number, because the mean of its divisors is an integer number (92718).

2⁶⁷⁹⁸⁶⁶ is an apocalyptic number.

679866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

679866 is an abundant number, since it is smaller than the sum of its proper divisors (803622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679866 is a wasteful number, since it uses less digits than its factorization.

679866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10317.

The product of its digits is 108864, while the sum is 42.

The square root of 679866 is about 824.5398716860. The cubic root of 679866 is about 87.9308168365.

The spelling of 679866 in words is "six hundred seventy-nine thousand, eight hundred sixty-six".