6649579 has 2 divisors, whose sum is σ = 6649580. Its totient is φ = 6649578.

The previous prime is 6649571. The next prime is 6649583. The reversal of 6649579 is 9759466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6649579 - 2³ = 6649571 is a prime.

It is not a weakly prime, because it can be changed into another prime (6649571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324789 + 3324790.

It is an arithmetic number, because the mean of its divisors is an integer number (3324790).

Almost surely, 2^6649579 is an apocalyptic number.

6649579 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649579 is an equidigital number, since it uses as much as digits as its factorization.

6649579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 6649579 is about 2578.6777619548. The cubic root of 6649579 is about 188.0462670946.

The spelling of 6649579 in words is "six million, six hundred forty-nine thousand, five hundred seventy-nine".