6765991 has 2 divisors, whose sum is σ = 6765992. Its totient is φ = 6765990.

The previous prime is 6765977. The next prime is 6766003. The reversal of 6765991 is 1995676.

6765991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6765991 - 2⁵ = 6765959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6765901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3382995 + 3382996.

It is an arithmetic number, because the mean of its divisors is an integer number (3382996).

Almost surely, 2^6765991 is an apocalyptic number.

6765991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6765991 is an equidigital number, since it uses as much as digits as its factorization.

6765991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 43.

The square root of 6765991 is about 2601.1518602342. The cubic root of 6765991 is about 189.1372797690.

The spelling of 6765991 in words is "six million, seven hundred sixty-five thousand, nine hundred ninety-one".