6688907 has 2 divisors, whose sum is σ = 6688908. Its totient is φ = 6688906.

The previous prime is 6688859. The next prime is 6688909. The reversal of 6688907 is 7098866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6688907 - 2⁸ = 6688651 is a prime.

Together with 6688909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6688909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344453 + 3344454.

It is an arithmetic number, because the mean of its divisors is an integer number (3344454).

Almost surely, 2^6688907 is an apocalyptic number.

6688907 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688907 is an equidigital number, since it uses as much as digits as its factorization.

6688907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 6688907 is about 2586.2921335379. The cubic root of 6688907 is about 188.4162630227.

The spelling of 6688907 in words is "six million, six hundred eighty-eight thousand, nine hundred seven".