6766891 has 2 divisors, whose sum is σ = 6766892. Its totient is φ = 6766890.

The previous prime is 6766883. The next prime is 6766909. The reversal of 6766891 is 1986676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6766891 - 2³ = 6766883 is a prime.

It is not a weakly prime, because it can be changed into another prime (6766801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3383445 + 3383446.

It is an arithmetic number, because the mean of its divisors is an integer number (3383446).

Almost surely, 2^6766891 is an apocalyptic number.

6766891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766891 is an equidigital number, since it uses as much as digits as its factorization.

6766891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 6766891 is about 2601.3248547615. The cubic root of 6766891 is about 189.1456656312.

The spelling of 6766891 in words is "six million, seven hundred sixty-six thousand, eight hundred ninety-one".