import java.util.*;
import java.io.*;
public class LCMChallenge
{
	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 == 1)
		{
			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));
			}
		}
	}
}
