556665447 has 16 divisors (see below), whose sum is σ = 800362080. Its totient is φ = 342114432.

The previous prime is 556665433. The next prime is 556665449. The reversal of 556665447 is 744566655.

It is not a de Polignac number, because 556665447 - 2⁸ = 556665191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 556665396 and 556665405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556665449) 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 15 ways as a sum of consecutive naturals, for example, 22129 + ... + 40037.

It is an arithmetic number, because the mean of its divisors is an integer number (50022630).

Almost surely, 2^556665447 is an apocalyptic number.

556665447 is a deficient number, since it is larger than the sum of its proper divisors (243696633).

556665447 is a wasteful number, since it uses less digits than its factorization.

556665447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18722.

The product of its digits is 3024000, while the sum is 48.

The square root of 556665447 is about 23593.7586450315. The cubic root of 556665447 is about 822.6177728208.

The spelling of 556665447 in words is "five hundred fifty-six million, six hundred sixty-five thousand, four hundred forty-seven".