6716217779 has 2 divisors, whose sum is σ = 6716217780. Its totient is φ = 6716217778.

The previous prime is 6716217743. The next prime is 6716217803. The reversal of 6716217779 is 9777126176.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6716217779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6716217779.

It is not a weakly prime, because it can be changed into another prime (6716217379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3358108889 + 3358108890.

It is an arithmetic number, because the mean of its divisors is an integer number (3358108890).

Almost surely, 2^6716217779 is an apocalyptic number.

6716217779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6716217779 is an equidigital number, since it uses as much as digits as its factorization.

6716217779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555848, while the sum is 53.

The square root of 6716217779 is about 81952.5336948163. The cubic root of 6716217779 is about 1886.7234907400.

The spelling of 6716217779 in words is "six billion, seven hundred sixteen million, two hundred seventeen thousand, seven hundred seventy-nine".