public static void DigitsTest()
{
// Arrange
long n = 6872368725336316;
List <int> expected = new List <int> {
6, 8, 7, 2, 3, 6, 8, 7, 2, 5, 3, 3, 6, 3, 1, 6
};
expected.Reverse();
//Act
var actual = UtilityFunctions.Digits(n);
//Assert
Assert.True(actual.SequenceEqual(expected));
}