12766667 has 2 divisors, whose sum is σ = 12766668. Its totient is φ = 12766666.

The previous prime is 12766639. The next prime is 12766669. The reversal of 12766667 is 76666721.

12766667 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12766667 - 2⁶ = 12766603 is a prime.

Together with 12766669, 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 (12766669) 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, 6383333 + 6383334.

It is an arithmetic number, because the mean of its divisors is an integer number (6383334).

Almost surely, 2^12766667 is an apocalyptic number.

12766667 is a deficient number, since it is larger than the sum of its proper divisors (1).

12766667 is an equidigital number, since it uses as much as digits as its factorization.

12766667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 12766667 is about 3573.0472988753. The cubic root of 12766667 is about 233.7181877837.

The spelling of 12766667 in words is "twelve million, seven hundred sixty-six thousand, six hundred sixty-seven".