6685667 has 2 divisors, whose sum is σ = 6685668. Its totient is φ = 6685666.

The previous prime is 6685643. The next prime is 6685669. The reversal of 6685667 is 7665866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6685667 - 2⁶ = 6685603 is a prime.

Together with 6685669, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (6685669) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342833 + 3342834.

It is an arithmetic number, because the mean of its divisors is an integer number (3342834).

Almost surely, 2^6685667 is an apocalyptic number.

6685667 is a deficient number, since it is larger than the sum of its proper divisors (1).

6685667 is an equidigital number, since it uses as much as digits as its factorization.

6685667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 6685667 is about 2585.6656783119. The cubic root of 6685667 is about 188.3858361640.

The spelling of 6685667 in words is "six million, six hundred eighty-five thousand, six hundred sixty-seven".