555866 has 8 divisors (see below), whose sum is σ = 882900. Its totient is φ = 261568.

The previous prime is 555857. The next prime is 555871. The reversal of 555866 is 668555.

It can be written as a sum of positive squares in 2 ways, for example, as 555025 + 841 = 745^2 + 29^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 8141 + ... + 8208.

2⁵⁵⁵⁸⁶⁶ is an apocalyptic number.

555866 is a deficient number, since it is larger than the sum of its proper divisors (327034).

555866 is a wasteful number, since it uses less digits than its factorization.

555866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368.

The product of its digits is 36000, while the sum is 35.

The square root of 555866 is about 745.5642158795. The cubic root of 555866 is about 82.2223787298. Note that the first 3 decimals are identical.

The spelling of 555866 in words is "five hundred fifty-five thousand, eight hundred sixty-six".