556066123 has 4 divisors (see below), whose sum is σ = 558045288. Its totient is φ = 554086960.

The previous prime is 556066117. The next prime is 556066163. The reversal of 556066123 is 321660655.

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

It is a cyclic number.

It is not a de Polignac number, because 556066123 - 2⁹ = 556065611 is a prime.

It is a super-2 number, since 2×556066123² = 618419066296502258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556066163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989161 + ... + 989722.

It is an arithmetic number, because the mean of its divisors is an integer number (139511322).

Almost surely, 2^556066123 is an apocalyptic number.

556066123 is a deficient number, since it is larger than the sum of its proper divisors (1979165).

556066123 is a wasteful number, since it uses less digits than its factorization.

556066123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979164.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 556066123 is about 23581.0543233334. The cubic root of 556066123 is about 822.3224478553.

The spelling of 556066123 in words is "five hundred fifty-six million, sixty-six thousand, one hundred twenty-three".