need to find my iphone by the phone nuber

The only way to find it by the phone number would be to call the number and listen to see if you hear it ring.

To find it by Apple ID, see the information in If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

Also see If Find My iPhone or Find My iPad isn't enabled on your missing device - Apple Support including the following:

If your missing device doesn't appear in the Find My app or at iCloud.com/find, you didn't turn on Find My. There's no other Apple service that can find, track, or flag your device for you. But there are steps that you can take to help protect your data.