6684091 has 2 divisors, whose sum is σ = 6684092. Its totient is φ = 6684090.

The previous prime is 6684089. The next prime is 6684101. The reversal of 6684091 is 1904866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6684091 - 2¹ = 6684089 is a prime.

Together with 6684089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6684001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342045 + 3342046.

It is an arithmetic number, because the mean of its divisors is an integer number (3342046).

Almost surely, 2^6684091 is an apocalyptic number.

6684091 is a deficient number, since it is larger than the sum of its proper divisors (1).

6684091 is an equidigital number, since it uses as much as digits as its factorization.

6684091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6684091 is about 2585.3609032396. The cubic root of 6684091 is about 188.3710323850.

The spelling of 6684091 in words is "six million, six hundred eighty-four thousand, ninety-one".