6756458221 has 2 divisors, whose sum is σ = 6756458222. Its totient is φ = 6756458220.

The previous prime is 6756458129. The next prime is 6756458231. The reversal of 6756458221 is 1228546576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6418413225 + 338044996 = 80115^2 + 18386^2 .

It is a cyclic number.

It is not a de Polignac number, because 6756458221 - 2⁹ = 6756457709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6756458231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3378229110 + 3378229111.

It is an arithmetic number, because the mean of its divisors is an integer number (3378229111).

Almost surely, 2^6756458221 is an apocalyptic number.

It is an amenable number.

6756458221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6756458221 is an equidigital number, since it uses as much as digits as its factorization.

6756458221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 46.

The square root of 6756458221 is about 82197.6777105047. The cubic root of 6756458221 is about 1890.4841122439.

The spelling of 6756458221 in words is "six billion, seven hundred fifty-six million, four hundred fifty-eight thousand, two hundred twenty-one".