12661674757 has 2 divisors, whose sum is σ = 12661674758. Its totient is φ = 12661674756.

The previous prime is 12661674703. The next prime is 12661674793. The reversal of 12661674757 is 75747616621.

It is a happy number.

12661674757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12065045281 + 596629476 = 109841^2 + 24426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12661674757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12661374757) 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, 6330837378 + 6330837379.

It is an arithmetic number, because the mean of its divisors is an integer number (6330837379).

Almost surely, 2^12661674757 is an apocalyptic number.

It is an amenable number.

12661674757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661674757 is an equidigital number, since it uses as much as digits as its factorization.

12661674757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 52.

The spelling of 12661674757 in words is "twelve billion, six hundred sixty-one million, six hundred seventy-four thousand, seven hundred fifty-seven".