6778345614779 has 2 divisors, whose sum is σ = 6778345614780. Its totient is φ = 6778345614778.

The previous prime is 6778345614751. The next prime is 6778345614791. The reversal of 6778345614779 is 9774165438776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6778345614779 - 2³⁶ = 6709626138043 is a prime.

It is not a weakly prime, because it can be changed into another prime (6778345614379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389172807389 + 3389172807390.

It is an arithmetic number, because the mean of its divisors is an integer number (3389172807390).

Almost surely, 2^{6778345614779} is an apocalyptic number.

6778345614779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778345614779 is an equidigital number, since it uses as much as digits as its factorization.

6778345614779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1493614080, while the sum is 74.

The spelling of 6778345614779 in words is "six trillion, seven hundred seventy-eight billion, three hundred forty-five million, six hundred fourteen thousand, seven hundred seventy-nine".