43,252,003,274,489,856,000. At over 43 quintillion possible combinations, this is more than the total number of estimated seconds since the Big Bang. It is also over 7 billion combinations for each man, woman, and child on Earth!
One, and only one, of these possibilities presents the 'solved' Cube, having a single color on each of its 6 sides. If you allow one second for each turn, it would take you 1400 million million years to go through ALL the possible configurations. In comparison, the whole universe is only 14 thousand million years old.
The real Rubik's Cube has the Rubik's name on the sticker of the white center piece. The white center piece sticker is the proof one needs to tell the real from the fake. The real Rubik's Cube could be disassembled, as people did it a few times before figured out how to solve it.
3x3x3 cube. The 3x3x3 cube was the most popular cube, although there have been many variations, such as the 4x4x4 Rubik's Revenge cube and the pyramid, etc.