Sixty-Four or 64 is an upcoming square/cube numberblock that is 8 blocks by 8 blocks. Sixty-Four first appeared in The Big One as a compound numberblock, then in More to Explore, Eight draws Sixty-Four on the grid in the square temple (it's still unsure if it's Sixty-Four's figured-out form).
Punchcar's 64 (Note: Because of the blue blocks, he is male)
He is very kind and he’s a part of double trouble
Jupiter the planet's 64 and the official 64.
Zero, One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten, Eleven, Twelve, Thirteen, Fourteen, Fifteen, Sixteen, Seventeen, Eighteen, Nineteen, Twenty, Twenty-One, Twenty-Two, Twenty-Five, Thirty, Forty, Fifty, Sixty, Seventy, Eighty, Ninety, One Hundred, One Thousand, Ten Thousand, One Hundred Thousand, One Million
Big Bad Square, The Terrible Twos, Octoblock, The Three Threes, Octonaughty, Step Squad, The Four Fours
Twenty-Three, Twenty-Four, Thirty-Five, Thirty-Six, Forty-Two, Forty-Nine, Sixty-Four, Ninety-Nine, Two Hundred, Three Hundred
Flapjack Snaffler, Blockzilla, Big Tum
Fluffies, Squarey, Numberblobs, Aliens, Rainbows, Flatlanders, Alphablocks