12666568 has 8 divisors (see below), whose sum is σ = 23749830. Its totient is φ = 6333280.

The previous prime is 12666557. The next prime is 12666571. The reversal of 12666568 is 86566621.

It can be written as a sum of positive squares in only one way, i.e., 11710084 + 956484 = 3422^2 + 978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12666568.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791653 + ... + 791668.

Almost surely, 2^12666568 is an apocalyptic number.

It is an amenable number.

12666568 is a deficient number, since it is larger than the sum of its proper divisors (11083262).

12666568 is a wasteful number, since it uses less digits than its factorization.

12666568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583327 (or 1583323 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 12666568 is about 3559.0122225134. The cubic root of 12666568 is about 233.1057499792.

The spelling of 12666568 in words is "twelve million, six hundred sixty-six thousand, five hundred sixty-eight".