556271866 has 4 divisors (see below), whose sum is σ = 834407802. Its totient is φ = 278135932.

The previous prime is 556271861. The next prime is 556271867. The reversal of 556271866 is 668172655.

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., 356643225 + 199628641 = 18885^2 + 14129^2 .

It is not an unprimeable number, because it can be changed into a prime (556271861) by changing a digit.

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 as a sum of consecutive naturals, namely, 139067965 + ... + 139067968.

Almost surely, 2^556271866 is an apocalyptic number.

556271866 is a deficient number, since it is larger than the sum of its proper divisors (278135936).

556271866 is a wasteful number, since it uses less digits than its factorization.

556271866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278135935.

The product of its digits is 604800, while the sum is 46.

The square root of 556271866 is about 23585.4163838589. The cubic root of 556271866 is about 822.4238543958.

The spelling of 556271866 in words is "five hundred fifty-six million, two hundred seventy-one thousand, eight hundred sixty-six".