13056566 has 4 divisors (see below), whose sum is σ = 19584852. Its totient is φ = 6528282.

The previous prime is 13056559. The next prime is 13056599. The reversal of 13056566 is 66565031.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 3264140 + ... + 3264143.

It is an arithmetic number, because the mean of its divisors is an integer number (4896213).

Almost surely, 2^13056566 is an apocalyptic number.

13056566 is a deficient number, since it is larger than the sum of its proper divisors (6528286).

13056566 is an equidigital number, since it uses as much as digits as its factorization.

13056566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6528285.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 13056566 is about 3613.3870537212. The cubic root of 13056566 is about 235.4740153112.

The spelling of 13056566 in words is "thirteen million, fifty-six thousand, five hundred sixty-six".