6683064721 has 2 divisors, whose sum is σ = 6683064722. Its totient is φ = 6683064720.

The previous prime is 6683064709. The next prime is 6683064737. The reversal of 6683064721 is 1274603866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6620100496 + 62964225 = 81364^2 + 7935^2 .

It is a cyclic number.

It is not a de Polignac number, because 6683064721 - 2⁷ = 6683064593 is a prime.

It is not a weakly prime, because it can be changed into another prime (6683004721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3341532360 + 3341532361.

It is an arithmetic number, because the mean of its divisors is an integer number (3341532361).

Almost surely, 2^6683064721 is an apocalyptic number.

It is an amenable number.

6683064721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6683064721 is an equidigital number, since it uses as much as digits as its factorization.

6683064721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 6683064721 is about 81750.0135840967. The cubic root of 6683064721 is about 1883.6139102763.

The spelling of 6683064721 in words is "six billion, six hundred eighty-three million, sixty-four thousand, seven hundred twenty-one".