12661465259 has 2 divisors, whose sum is σ = 12661465260. Its totient is φ = 12661465258.

The previous prime is 12661465171. The next prime is 12661465261. The reversal of 12661465259 is 95256416621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12661465259 is a prime.

Together with 12661465261, 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 (12661465459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330732629 + 6330732630.

It is an arithmetic number, because the mean of its divisors is an integer number (6330732630).

Almost surely, 2^12661465259 is an apocalyptic number.

12661465259 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661465259 is an equidigital number, since it uses as much as digits as its factorization.

12661465259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 47.

The spelling of 12661465259 in words is "twelve billion, six hundred sixty-one million, four hundred sixty-five thousand, two hundred fifty-nine".