public static void Main()
{
var n = ulong.Parse(Console.ReadLine());
var eulerFunction = new EulerFunction();
Console.WriteLine(eulerFunction.EulerFunctionCalculator(n));
}
public void EulerFuncNumberOfReciprocalPrimes()
{
//Arrange
EulerFunction eulerFunction = new EulerFunction();
//Act
var result = eulerFunction.EulerFunctionCalculator(9);
//Assert
Assert.AreEqual(result, 6, "Wrong result");
}