In the movie, Hail Caesar! the main character, Eddie Maddix, admits at the beginning and the end that it has been 27 hours since his last confession.
Also, right before George Clooney's character is kidnapped, you see a large 27 on the side of the building he is getting ready to go into. The room he is entering says, "room no. 14." (Which is 2 x 7.)