6704007766721 has 2 divisors, whose sum is σ = 6704007766722. Its totient is φ = 6704007766720.

The previous prime is 6704007766699. The next prime is 6704007766723. The reversal of 6704007766721 is 1276677004076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4126342195600 + 2577665571121 = 2031340^2 + 1605511^2 .

It is a cyclic number.

It is not a de Polignac number, because 6704007766721 - 2¹⁸ = 6704007504577 is a prime.

It is a Sophie Germain prime.

Together with 6704007766723, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6704007766723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3352003883360 + 3352003883361.

It is an arithmetic number, because the mean of its divisors is an integer number (3352003883361).

Almost surely, 2^{6704007766721} is an apocalyptic number.

It is an amenable number.

6704007766721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6704007766721 is an equidigital number, since it uses as much as digits as its factorization.

6704007766721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4148928, while the sum is 53.

The spelling of 6704007766721 in words is "six trillion, seven hundred four billion, seven million, seven hundred sixty-six thousand, seven hundred twenty-one".