12662706564523 has 2 divisors, whose sum is σ = 12662706564524. Its totient is φ = 12662706564522.

The previous prime is 12662706564511. The next prime is 12662706564643. The reversal of 12662706564523 is 32546560726621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12662706564523 - 2⁵ = 12662706564491 is a prime.

It is not a weakly prime, because it can be changed into another prime (12662706561523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331353282261 + 6331353282262.

It is an arithmetic number, because the mean of its divisors is an integer number (6331353282262).

Almost surely, 2^{12662706564523} is an apocalyptic number.

12662706564523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12662706564523 is an equidigital number, since it uses as much as digits as its factorization.

12662706564523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21772800, while the sum is 55.

The spelling of 12662706564523 in words is "twelve trillion, six hundred sixty-two billion, seven hundred six million, five hundred sixty-four thousand, five hundred twenty-three".