#include <stdio.h>
long long n;
int main()
{
	scanf("%lld\n", &n);
	printf("%lld\n", n & 1 ? n * (n - 1) * (n - 2) : !(n % 3) ? (n - 1) * (n - 2) * (n - 3) : n * (n - 1) * (n - 3));
	return 0;
}