12645566 has 16 divisors (see below), whose sum is σ = 19720800. Its totient is φ = 6074208.

The previous prime is 12645547. The next prime is 12645623. The reversal of 12645566 is 66554621.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 14840 + ... + 15668.

It is an arithmetic number, because the mean of its divisors is an integer number (1232550).

Almost surely, 2^12645566 is an apocalyptic number.

12645566 is a deficient number, since it is larger than the sum of its proper divisors (7075234).

12645566 is a wasteful number, since it uses less digits than its factorization.

12645566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its digits is 43200, while the sum is 35.

The square root of 12645566 is about 3556.0604606784. The cubic root of 12645566 is about 232.9768438370.

The spelling of 12645566 in words is "twelve million, six hundred forty-five thousand, five hundred sixty-six".