using System;

public class Program

{

    public static void Main()

    {

        ulong val = 2666245470346586112L;

        byte bits = Evaluate(val);

        Console.WriteLine(bits);

    }

    public static byte Evaluate(ulong n) {

        ulong mask = 0xFF;

        byte result = 0;

        for (int i = 0; i < 8; i++) {

            if ((n & (mask << (i * 8))) != 0) {

                result |= (byte)(1 << i);

            }

        }

        return result;

    }

}