12666466234447 has 2 divisors, whose sum is σ = 12666466234448. Its totient is φ = 12666466234446.

The previous prime is 12666466234423. The next prime is 12666466234523. The reversal of 12666466234447 is 74443266466621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12666466234447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12666466235447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333233117223 + 6333233117224.

It is an arithmetic number, because the mean of its divisors is an integer number (6333233117224).

Almost surely, 2^{12666466234447} is an apocalyptic number.

12666466234447 is a deficient number, since it is larger than the sum of its proper divisors (1).

12666466234447 is an equidigital number, since it uses as much as digits as its factorization.

12666466234447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 167215104, while the sum is 61.

The spelling of 12666466234447 in words is "twelve trillion, six hundred sixty-six billion, four hundred sixty-six million, two hundred thirty-four thousand, four hundred forty-seven".