6778345611779 has 8 divisors (see below), whose sum is σ = 8083492903680. Its totient is φ = 5557401371016.

The previous prime is 6778345611757. The next prime is 6778345611787. The reversal of 6778345611779 is 9771165438776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6778345611779 - 2²⁰ = 6778344563203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6778345614779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21050762609 + ... + 21050762930.

It is an arithmetic number, because the mean of its divisors is an integer number (1010436612960).

Almost surely, 2^{6778345611779} is an apocalyptic number.

6778345611779 is a deficient number, since it is larger than the sum of its proper divisors (1305147291901).

6778345611779 is a wasteful number, since it uses less digits than its factorization.

6778345611779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42101525569.

The product of its digits is 373403520, while the sum is 71.

The spelling of 6778345611779 in words is "six trillion, seven hundred seventy-eight billion, three hundred forty-five million, six hundred eleven thousand, seven hundred seventy-nine".