12661503017 has 2 divisors, whose sum is σ = 12661503018. Its totient is φ = 12661503016.

The previous prime is 12661502977. The next prime is 12661503061. The reversal of 12661503017 is 71030516621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11626014976 + 1035488041 = 107824^2 + 32179^2 .

It is a cyclic number.

It is not a de Polignac number, because 12661503017 - 2³⁰ = 11587761193 is a prime.

It is not a weakly prime, because it can be changed into another prime (12661503077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330751508 + 6330751509.

It is an arithmetic number, because the mean of its divisors is an integer number (6330751509).

Almost surely, 2^12661503017 is an apocalyptic number.

It is an amenable number.

12661503017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661503017 is an equidigital number, since it uses as much as digits as its factorization.

12661503017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The spelling of 12661503017 in words is "twelve billion, six hundred sixty-one million, five hundred three thousand, seventeen".