12661465171 has 2 divisors, whose sum is σ = 12661465172. Its totient is φ = 12661465170.

The previous prime is 12661465153. The next prime is 12661465259. The reversal of 12661465171 is 17156416621.

12661465171 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 (17156416621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12661465171 - 2⁹ = 12661464659 is a prime.

It is not a weakly prime, because it can be changed into another prime (12661465121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330732585 + 6330732586.

It is an arithmetic number, because the mean of its divisors is an integer number (6330732586).

Almost surely, 2^12661465171 is an apocalyptic number.

12661465171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661465171 is an equidigital number, since it uses as much as digits as its factorization.

12661465171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The spelling of 12661465171 in words is "twelve billion, six hundred sixty-one million, four hundred sixty-five thousand, one hundred seventy-one".