6722779011679 has 4 divisors (see below), whose sum is σ = 6722784669784. Its totient is φ = 6722773353576.

The previous prime is 6722779011671. The next prime is 6722779011701. The reversal of 6722779011679 is 9761109772276.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6722779011679 - 2³ = 6722779011671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6722779011679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6722779011671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283032 + ... + 3677725.

It is an arithmetic number, because the mean of its divisors is an integer number (1680696167446).

Almost surely, 2^{6722779011679} is an apocalyptic number.

6722779011679 is a deficient number, since it is larger than the sum of its proper divisors (5658105).

6722779011679 is a wasteful number, since it uses less digits than its factorization.

6722779011679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658104.

The product of its (nonzero) digits is 28005264, while the sum is 64.

The spelling of 6722779011679 in words is "six trillion, seven hundred twenty-two billion, seven hundred seventy-nine million, eleven thousand, six hundred seventy-nine".