56711666 has 16 divisors (see below), whose sum is σ = 93063168. Its totient is φ = 25705200.

The previous prime is 56711663. The next prime is 56711671. The reversal of 56711666 is 66611765.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56711663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751 + ... + 11661.

It is an arithmetic number, because the mean of its divisors is an integer number (5816448).

Almost surely, 2^56711666 is an apocalyptic number.

56711666 is a deficient number, since it is larger than the sum of its proper divisors (36351502).

56711666 is a wasteful number, since it uses less digits than its factorization.

56711666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7297.

The product of its digits is 45360, while the sum is 38.

The square root of 56711666 is about 7530.7148399073. The cubic root of 56711666 is about 384.2000955493.

Subtracting 56711666 from its reverse (66611765), we obtain a palindrome (9900099).

It can be divided in two parts, 5671 and 1666, that added together give a palindrome (7337).

The spelling of 56711666 in words is "fifty-six million, seven hundred eleven thousand, six hundred sixty-six".