56866 has 4 divisors (see below), whose sum is σ = 85302. Its totient is φ = 28432.

The previous prime is 56857. The next prime is 56873. The reversal of 56866 is 66865.

56866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 50625 + 6241 = 225^2 + 79^2 .

It is a plaindrome in base 12.

It is a zygodrome in base 3.

It is an unprimeable number.

56866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14215 + ... + 14218.

2⁵⁶⁸⁶⁶ is an apocalyptic number.

56866 is a deficient number, since it is larger than the sum of its proper divisors (28436).

56866 is a wasteful number, since it uses less digits than its factorization.

56866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28435.

The product of its digits is 8640, while the sum is 31.

The square root of 56866 is about 238.4659304806. The cubic root of 56866 is about 38.4548298043.

Subtracting 56866 from its reverse (66865), we obtain a palindrome (9999).

The spelling of 56866 in words is "fifty-six thousand, eight hundred sixty-six".