#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  long long int n;
  cin >> n;
  if (n == 1) cout << 1 << endl;
  if (n == 2) cout << 2 << endl;
  if (n >= 3) {
    if (n % 2 == 1) cout << n * (n - 1) * (n - 2) << endl;
    if (n % 2 == 0 && n % 3 != 0) cout << (n * (n - 1) * (n - 3)) << endl;
    if (n % 2 == 0 && n % 3 == 0) cout << (n - 2) * (n - 3) * (n - 1) << endl;
  }
  return 0;
}
