source_code: import java.util.*;
  public class Main
  {
      public static void main(String[]args)
      {
          Scanner input=new Scanner (System.in);
          while(input.hasNext())
          {
              long n=input.nextLong();
              if(n==1||n==2)
                  System.out.println(n);
              else if(n%2==1)
                  System.out.println(n*(n-1)*(n-2));
              else
                  if(n%3!=0)
                      System.out.println(Math.max(n*(n-1)*(n-3),n*(n-1)*(n-2)/2));
                  else
                      System.out.println(Math.max(  Math.max(n*(n-1)*(n-3)/3,n*(n-1)*(n-2)/2) , Math.max((n-2)*(n-1)*(n-3),n*(n-2)*(n-3)/6) ));
          }
      }
  }