12668659 has 2 divisors, whose sum is σ = 12668660. Its totient is φ = 12668658.

The previous prime is 12668641. The next prime is 12668717. The reversal of 12668659 is 95686621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12668659 - 2⁵ = 12668627 is a prime.

It is not a weakly prime, because it can be changed into another prime (12668609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6334329 + 6334330.

It is an arithmetic number, because the mean of its divisors is an integer number (6334330).

Almost surely, 2^12668659 is an apocalyptic number.

12668659 is a deficient number, since it is larger than the sum of its proper divisors (1).

12668659 is an equidigital number, since it uses as much as digits as its factorization.

12668659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 12668659 is about 3559.3059716748. The cubic root of 12668659 is about 233.1185763239.

The spelling of 12668659 in words is "twelve million, six hundred sixty-eight thousand, six hundred fifty-nine".