6786680561 has 2 divisors, whose sum is σ = 6786680562. Its totient is φ = 6786680560.

The previous prime is 6786680539. The next prime is 6786680591. The reversal of 6786680561 is 1650866876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4765278961 + 2021401600 = 69031^2 + 44960^2 .

It is a cyclic number.

It is not a de Polignac number, because 6786680561 - 2¹⁴ = 6786664177 is a prime.

It is not a weakly prime, because it can be changed into another prime (6786680501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3393340280 + 3393340281.

It is an arithmetic number, because the mean of its divisors is an integer number (3393340281).

Almost surely, 2^6786680561 is an apocalyptic number.

It is an amenable number.

6786680561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6786680561 is an equidigital number, since it uses as much as digits as its factorization.

6786680561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The square root of 6786680561 is about 82381.3119645469. The cubic root of 6786680561 is about 1893.2986970833.

The spelling of 6786680561 in words is "six billion, seven hundred eighty-six million, six hundred eighty thousand, five hundred sixty-one".