12037408661 has 2 divisors, whose sum is σ = 12037408662. Its totient is φ = 12037408660.

The previous prime is 12037408631. The next prime is 12037408693. The reversal of 12037408661 is 16680473021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12035406436 + 2002225 = 109706^2 + 1415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12037408661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12037408631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6018704330 + 6018704331.

It is an arithmetic number, because the mean of its divisors is an integer number (6018704331).

Almost surely, 2^12037408661 is an apocalyptic number.

It is an amenable number.

12037408661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12037408661 is an equidigital number, since it uses as much as digits as its factorization.

12037408661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 12037408661 in words is "twelve billion, thirty-seven million, four hundred eight thousand, six hundred sixty-one".