12666047 has 2 divisors, whose sum is σ = 12666048. Its totient is φ = 12666046.

The previous prime is 12666029. The next prime is 12666067. The reversal of 12666047 is 74066621.

12666047 is nontrivially palindromic in base 3.

12666047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (74066621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12666047 - 2⁸ = 12665791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12666067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333023 + 6333024.

It is an arithmetic number, because the mean of its divisors is an integer number (6333024).

Almost surely, 2^12666047 is an apocalyptic number.

12666047 is a deficient number, since it is larger than the sum of its proper divisors (1).

12666047 is an equidigital number, since it uses as much as digits as its factorization.

12666047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 12666047 is about 3558.9390272945. The cubic root of 12666047 is about 233.1025539079.

Multiplying 12666047 by its sum of digits (32), we get a palindrome (405313504).

The spelling of 12666047 in words is "twelve million, six hundred sixty-six thousand, forty-seven".