what can cause 66 volts at 110 outlets in my moble home
Classic sign of a bad neutral connection. It's a dangerous situation and needs the attention of a professional electrician if it is in your house. But FIRST, call your utility, because it might be on their side and they will check that for free. If they don't find anything, they will not help you with your house wiring, that's your problem. But if you call the electrician first and it turns out to be a utility issue, you still owe the electrician for the house call.