12600661 has 2 divisors, whose sum is σ = 12600662. Its totient is φ = 12600660.

The previous prime is 12600649. The next prime is 12600691. The reversal of 12600661 is 16600621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7896100 + 4704561 = 2810^2 + 2169^2 .

It is a cyclic number.

It is not a de Polignac number, because 12600661 - 2⁹ = 12600149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12600631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6300330 + 6300331.

It is an arithmetic number, because the mean of its divisors is an integer number (6300331).

Almost surely, 2^12600661 is an apocalyptic number.

It is an amenable number.

12600661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12600661 is an equidigital number, since it uses as much as digits as its factorization.

12600661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12600661 is about 3549.7409764657. The cubic root of 12600661 is about 232.7007461878.

The spelling of 12600661 in words is "twelve million, six hundred thousand, six hundred sixty-one".