The Rubik's Cube 6x6x6 is yet another larger version of the original Rubik's Cube. It is often called the "V-Cube 6" becuase V-Cube were the first to mass produce this puzzle. The mechanism was invented by Panagiotis Verdes and V-Cube actually patented it in 2004. This puzzle is quite similar to the Rubik's Revnge only it has 6 parts per edge. As with all even-order Rubik's Cubes, the centers of this puzzle can move around and cannot be immediately used as a reference point.
This puzzle is made of 8 corner pieces, 48 edge pieces and 96 center pieces, allowing a massive 1.57x10116 different combinations. Solving it, however, is not very different to any high-order Rubik's Cube with the reduction method: group the 4x4 centers, group the 4x1 edges, and solve like a regular 3x3x3 Rubik's Cube (accounting for parity cases).
The official record for solving the 6x6x6 Rubik's Cube is 1:19.60 set by Max Park at SacCubing III 2018.