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