6626779 has 2 divisors, whose sum is σ = 6626780. Its totient is φ = 6626778.

The previous prime is 6626747. The next prime is 6626797. The reversal of 6626779 is 9776266.

It is a happy number.

Together with next prime (6626797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6626779 - 2⁵ = 6626747 is a prime.

It is not a weakly prime, because it can be changed into another prime (6626729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3313389 + 3313390.

It is an arithmetic number, because the mean of its divisors is an integer number (3313390).

Almost surely, 2^6626779 is an apocalyptic number.

6626779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6626779 is an equidigital number, since it uses as much as digits as its factorization.

6626779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The square root of 6626779 is about 2574.2530955600. The cubic root of 6626779 is about 187.8310973571.

The spelling of 6626779 in words is "six million, six hundred twenty-six thousand, seven hundred seventy-nine".