12655567 has 2 divisors, whose sum is σ = 12655568. Its totient is φ = 12655566.

The previous prime is 12655561. The next prime is 12655579. The reversal of 12655567 is 76555621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12655567 - 2⁷ = 12655439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12655561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327783 + 6327784.

It is an arithmetic number, because the mean of its divisors is an integer number (6327784).

Almost surely, 2^12655567 is an apocalyptic number.

12655567 is a deficient number, since it is larger than the sum of its proper divisors (1).

12655567 is an equidigital number, since it uses as much as digits as its factorization.

12655567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 37.

The square root of 12655567 is about 3557.4663736991. The cubic root of 12655567 is about 233.0382457925.

The spelling of 12655567 in words is "twelve million, six hundred fifty-five thousand, five hundred sixty-seven".