Related Clues:

• Only even prime
• Turtledove tally
• Countdown end
• A couple
• White Monopoly bill
• Tango need
• Eagle's bill?
• It contains four quarters
• Number before 'Liftoff!'
• Bill in the till
• With 71-Across, heavy, as a truck
• It's dialed before a long-distance number
• Low number
• Low die roll
• Word for the books