12996661 has 2 divisors, whose sum is σ = 12996662. Its totient is φ = 12996660.

The previous prime is 12996647. The next prime is 12996667. The reversal of 12996661 is 16669921.

12996661 is digitally balanced in base 3, 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., 10850436 + 2146225 = 3294^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 12996661 - 2⁵ = 12996629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12996667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6498330 + 6498331.

It is an arithmetic number, because the mean of its divisors is an integer number (6498331).

Almost surely, 2^12996661 is an apocalyptic number.

It is an amenable number.

12996661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12996661 is an equidigital number, since it uses as much as digits as its factorization.

12996661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 12996661 is about 3605.0882097391. The cubic root of 12996661 is about 235.1133360059.

The spelling of 12996661 in words is "twelve million, nine hundred ninety-six thousand, six hundred sixty-one".