It's going to be HUUUUUUUGE

Right. Of what thickness would the stone have to be? Because, maybe it could if they were cut into tiles.

The earth at the equator is roughly 131 million feet in circumference (sorry, used to imperial) and the pyramid of Giza has around 88 million cubic feet of stone. (Source: Google). The wall would need to be around 3 inches thick. 88 divided by 2 feet tall and multiplied by 4 is roughly 131. So yes, it is--but a small wall.

88 divided by 2, multiplied by 4 is 176... Im confused by your math skills.

Common core, adapt or be left behind;-)