#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n;
  cin >> n;
  if (n == 1 || n == 2)
    cout << n;
  else if (n % 2 == 1)
    cout << n * (n - 1) * (n - 2);
  else {
    if (n % 3 == 0)
      cout << (n - 1) * (n - 2) * (n - 3);
    else
      cout << n * (n - 1) * (n - 3);
  }
}
