6688967 has 2 divisors, whose sum is σ = 6688968. Its totient is φ = 6688966.

The previous prime is 6688943. The next prime is 6688999. The reversal of 6688967 is 7698866.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6688967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6688907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344483 + 3344484.

It is an arithmetic number, because the mean of its divisors is an integer number (3344484).

Almost surely, 2^6688967 is an apocalyptic number.

6688967 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688967 is an equidigital number, since it uses as much as digits as its factorization.

6688967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 6688967 is about 2586.3037331296. The cubic root of 6688967 is about 188.4168263904.

The spelling of 6688967 in words is "six million, six hundred eighty-eight thousand, nine hundred sixty-seven".