source_code: 
  import java.util.Scanner;
  
  /**
   * 2013.07.27 No.1 235A LCM Challenge
   * 数论 n%2 == 0?     n%3 == 0?
   * @author Administrator * 
   */
  
  public class Main {
      public static void main(String[] args) {
          Scanner in = new Scanner(System.in);
          int n = in.nextInt();
          if (n < 3)
              System.out.println(n);
          else if (n % 2 != 0)
              System.out.println((long)n * (n - 1) * (n - 2));
          else if(n % 3 != 0)
              System.out.println((long)n * (n - 1) * (n - 3));
          else 
              System.out.println((long)(n - 1) * (n - 2) * (n - 3));
          in.close();
          
  
      }
  } 