6746995721 has 2 divisors, whose sum is σ = 6746995722. Its totient is φ = 6746995720.

The previous prime is 6746995709. The next prime is 6746995733. The reversal of 6746995721 is 1275996476.

It is a balanced prime because it is at equal distance from previous prime (6746995709) and next prime (6746995733).

It can be written as a sum of positive squares in only one way, i.e., 4816360000 + 1930635721 = 69400^2 + 43939^2 .

It is a cyclic number.

It is not a de Polignac number, because 6746995721 - 2⁶ = 6746995657 is a prime.

It is not a weakly prime, because it can be changed into another prime (6746991721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3373497860 + 3373497861.

It is an arithmetic number, because the mean of its divisors is an integer number (3373497861).

Almost surely, 2^6746995721 is an apocalyptic number.

It is an amenable number.

6746995721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6746995721 is an equidigital number, since it uses as much as digits as its factorization.

6746995721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 56.

The square root of 6746995721 is about 82140.0981311807. The cubic root of 6746995721 is about 1889.6011514309.

The spelling of 6746995721 in words is "six billion, seven hundred forty-six million, nine hundred ninety-five thousand, seven hundred twenty-one".