556066642 has 4 divisors (see below), whose sum is σ = 834099966. Its totient is φ = 278033320.

The previous prime is 556066639. The next prime is 556066649. The reversal of 556066642 is 246660655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246660655 = 5 ⋅49332131.

It can be written as a sum of positive squares in only one way, i.e., 341473441 + 214593201 = 18479^2 + 14649^2 .

It is a super-2 number, since 2×556066642² = 618420220690312328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 556066595 and 556066604.

It is not an unprimeable number, because it can be changed into a prime (556066649) 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 as a sum of consecutive naturals, namely, 139016659 + ... + 139016662.

Almost surely, 2^556066642 is an apocalyptic number.

556066642 is a deficient number, since it is larger than the sum of its proper divisors (278033324).

556066642 is a wasteful number, since it uses less digits than its factorization.

556066642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278033323.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 556066642 is about 23581.0653279278. The cubic root of 556066642 is about 822.3227036913.

The spelling of 556066642 in words is "five hundred fifty-six million, sixty-six thousand, six hundred forty-two".