6618979 has 2 divisors, whose sum is σ = 6618980. Its totient is φ = 6618978.

The previous prime is 6618971. The next prime is 6618991. The reversal of 6618979 is 9798166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6618979 - 2³ = 6618971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6618971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309489 + 3309490.

It is an arithmetic number, because the mean of its divisors is an integer number (3309490).

Almost surely, 2^6618979 is an apocalyptic number.

6618979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6618979 is an equidigital number, since it uses as much as digits as its factorization.

6618979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 6618979 is about 2572.7376469434. The cubic root of 6618979 is about 187.7573733676.

The spelling of 6618979 in words is "six million, six hundred eighteen thousand, nine hundred seventy-nine".