Who called from 5866159497

Just now.  to my cell. I typically don't answer any number to my cell without caller id.  This call had none.

My son got one on his trac phone.  The automated message said something about lowering your interest rates.  I called the number back and it says "the number or code you have dialed is incorrect".

Just got one. No message. Blocked it

Just called my cell.  Did not answer and the caller did not leave a message.  Now blocked.

Another call to my cell phone.  This one from the Warren, MI area, and calling back gets THEIR message that you called the wrong number!  Is there any unknown number out there that isn'r a scam these days??