12665251603 has 2 divisors, whose sum is σ = 12665251604. Its totient is φ = 12665251602.

The previous prime is 12665251597. The next prime is 12665251637. The reversal of 12665251603 is 30615256621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12665251603 - 2⁹ = 12665251091 is a prime.

It is not a weakly prime, because it can be changed into another prime (12665251303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332625801 + 6332625802.

It is an arithmetic number, because the mean of its divisors is an integer number (6332625802).

Almost surely, 2^12665251603 is an apocalyptic number.

12665251603 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665251603 is an equidigital number, since it uses as much as digits as its factorization.

12665251603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 12665251603 in words is "twelve billion, six hundred sixty-five million, two hundred fifty-one thousand, six hundred three".