27

• Twenty-seven is a perfect cube, being 33 = 3 × 3 × 3.
• There are exactly 27 straight lines on a cubic surface.
• 27 is also a decagonal number
• The 27th moon of Jupiter is Sinope
• There are a total of 27 books in the New Testament
• The age in years at which many famous rock musicians died, sometimes referred to as the 27 Club. Occasionally, this is termed the "ideal" age to die, and the concept has inspired a brand of clothing, DeadAt27
• A number which American parodist "Weird Al" Yankovic hides somewhere in many of his songs and videos
• The code for international direct-dial phone calls to South Africa
• The number of letters in the Spanish alphabet
• The current number of Amendments to the United States Constitution
  

And at around 22.27 tonight, it’ll be my age…