6466679 has 2 divisors, whose sum is σ = 6466680. Its totient is φ = 6466678.

The previous prime is 6466661. The next prime is 6466709. The reversal of 6466679 is 9766646.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6466679 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6466279) 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 as a sum of consecutive naturals, namely, 3233339 + 3233340.

It is an arithmetic number, because the mean of its divisors is an integer number (3233340).

Almost surely, 2^6466679 is an apocalyptic number.

6466679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466679 is an equidigital number, since it uses as much as digits as its factorization.

6466679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 6466679 is about 2542.9665746918. The cubic root of 6466679 is about 186.3061113462.

The spelling of 6466679 in words is "six million, four hundred sixty-six thousand, six hundred seventy-nine".