12791566 has 8 divisors (see below), whose sum is σ = 19706040. Its totient is φ = 6222888.

The previous prime is 12791563. The next prime is 12791587. The reversal of 12791566 is 66519721.

12791566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12791563) 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, 86356 + ... + 86503.

It is an arithmetic number, because the mean of its divisors is an integer number (2463255).

Almost surely, 2^12791566 is an apocalyptic number.

12791566 is a deficient number, since it is larger than the sum of its proper divisors (6914474).

12791566 is a wasteful number, since it uses less digits than its factorization.

12791566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172898.

The product of its digits is 22680, while the sum is 37.

The square root of 12791566 is about 3576.5298824419. The cubic root of 12791566 is about 233.8700303403.

The spelling of 12791566 in words is "twelve million, seven hundred ninety-one thousand, five hundred sixty-six".