6756667409 has 2 divisors, whose sum is σ = 6756667410. Its totient is φ = 6756667408.

The previous prime is 6756667363. The next prime is 6756667417. The reversal of 6756667409 is 9047666576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6565536784 + 191130625 = 81028^2 + 13825^2 .

It is a cyclic number.

It is not a de Polignac number, because 6756667409 - 2¹² = 6756663313 is a prime.

It is not a weakly prime, because it can be changed into another prime (6756660409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3378333704 + 3378333705.

It is an arithmetic number, because the mean of its divisors is an integer number (3378333705).

Almost surely, 2^6756667409 is an apocalyptic number.

It is an amenable number.

6756667409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6756667409 is an equidigital number, since it uses as much as digits as its factorization.

6756667409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The square root of 6756667409 is about 82198.9501696950. The cubic root of 6756667409 is about 1890.5036225897.

The spelling of 6756667409 in words is "six billion, seven hundred fifty-six million, six hundred sixty-seven thousand, four hundred nine".