13057566 has 8 divisors (see below), whose sum is σ = 26115144. Its totient is φ = 4352520.

The previous prime is 13057543. The next prime is 13057567. The reversal of 13057566 is 66575031.

It is a sphenic number, since it is the product of 3 distinct primes.

13057566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13057567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088125 + ... + 1088136.

It is an arithmetic number, because the mean of its divisors is an integer number (3264393).

Almost surely, 2^13057566 is an apocalyptic number.

13057566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13057566 is a wasteful number, since it uses less digits than its factorization.

13057566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176266.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 13057566 is about 3613.5254253983. The cubic root of 13057566 is about 235.4800267950.

The spelling of 13057566 in words is "thirteen million, fifty-seven thousand, five hundred sixty-six".