6768007681 has 2 divisors, whose sum is σ = 6768007682. Its totient is φ = 6768007680.

The previous prime is 6768007679. The next prime is 6768007691. The reversal of 6768007681 is 1867008676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6176545281 + 591462400 = 78591^2 + 24320^2 .

It is a cyclic number.

It is not a de Polignac number, because 6768007681 - 2¹ = 6768007679 is a prime.

It is a super-2 number, since 2×6768007681² = 91611855940149995522, which contains 22 as substring.

Together with 6768007679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6768007691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3384003840 + 3384003841.

It is an arithmetic number, because the mean of its divisors is an integer number (3384003841).

Almost surely, 2^6768007681 is an apocalyptic number.

It is an amenable number.

6768007681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6768007681 is an equidigital number, since it uses as much as digits as its factorization.

6768007681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 6768007681 is about 82267.9018876743. The cubic root of 6768007681 is about 1891.5606941206.

The spelling of 6768007681 in words is "six billion, seven hundred sixty-eight million, seven thousand, six hundred eighty-one".