12576661 has 2 divisors, whose sum is σ = 12576662. Its totient is φ = 12576660.

The previous prime is 12576649. The next prime is 12576667. The reversal of 12576661 is 16667521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 1454436 = 3335^2 + 1206^2 .

It is a cyclic number.

It is not a de Polignac number, because 12576661 - 2¹⁵ = 12543893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12576667) 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, 6288330 + 6288331.

It is an arithmetic number, because the mean of its divisors is an integer number (6288331).

Almost surely, 2^12576661 is an apocalyptic number.

It is an amenable number.

12576661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12576661 is an equidigital number, since it uses as much as digits as its factorization.

12576661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 12576661 is about 3546.3588368917. The cubic root of 12576661 is about 232.5529135358.

The spelling of 12576661 in words is "twelve million, five hundred seventy-six thousand, six hundred sixty-one".