6679 has 2 divisors, whose sum is σ = 6680. Its totient is φ = 6678.

The previous prime is 6673. The next prime is 6689. The reversal of 6679 is 9766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6679 - 2⁷ = 6551 is a prime.

6679 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339 + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (3340).

6679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6679 is an equidigital number, since it uses as much as digits as its factorization.

6679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 28.

The square root of 6679 is about 81.7251491280. The cubic root of 6679 is about 18.8323195389.

It can be divided in two parts, 667 and 9, that added together give a palindrome (676).

The spelling of 6679 in words is "six thousand, six hundred seventy-nine".