6666330779 has 2 divisors, whose sum is σ = 6666330780. Its totient is φ = 6666330778.

The previous prime is 6666330703. The next prime is 6666330809. The reversal of 6666330779 is 9770336666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6666330779 - 2⁸ = 6666330523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6666330779.

It is not a weakly prime, because it can be changed into another prime (6666330679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333165389 + 3333165390.

It is an arithmetic number, because the mean of its divisors is an integer number (3333165390).

Almost surely, 2^6666330779 is an apocalyptic number.

6666330779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666330779 is an equidigital number, since it uses as much as digits as its factorization.

6666330779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5143824, while the sum is 53.

The square root of 6666330779 is about 81647.6011833783. The cubic root of 6666330779 is about 1882.0404489916.

The spelling of 6666330779 in words is "six billion, six hundred sixty-six million, three hundred thirty thousand, seven hundred seventy-nine".