556660 has 24 divisors (see below), whose sum is σ = 1259496. Its totient is φ = 205440.

The previous prime is 556651. The next prime is 556679. The reversal of 556660 is 66655.

It can be written as a sum of positive squares in 4 ways, for example, as 88804 + 467856 = 298^2 + 684^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (52479).

2⁵⁵⁶⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

556660 is an abundant number, since it is smaller than the sum of its proper divisors (702836).

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

556660 is a wasteful number, since it uses less digits than its factorization.

556660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 556660 is about 746.0965085028. The cubic root of 556660 is about 82.2615089693.

It can be divided in two parts, 5 and 56660, that added together give a palindrome (56665).

The spelling of 556660 in words is "five hundred fifty-six thousand, six hundred sixty".