12630526661 has 2 divisors, whose sum is σ = 12630526662. Its totient is φ = 12630526660.

The previous prime is 12630526631. The next prime is 12630526691. The reversal of 12630526661 is 16662503621.

It is a happy number.

12630526661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12630526631) and next prime (12630526691).

It can be written as a sum of positive squares in only one way, i.e., 8796564100 + 3833962561 = 93790^2 + 61919^2 .

It is an emirp because it is prime and its reverse (16662503621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12630526661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12630526631) 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, 6315263330 + 6315263331.

It is an arithmetic number, because the mean of its divisors is an integer number (6315263331).

Almost surely, 2^12630526661 is an apocalyptic number.

It is an amenable number.

12630526661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12630526661 is an equidigital number, since it uses as much as digits as its factorization.

12630526661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 12630526661 in words is "twelve billion, six hundred thirty million, five hundred twenty-six thousand, six hundred sixty-one".