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