As you're asking this behind the Blue Mask, I have no idea if you are the same person who asked this previously.
On the off chance you aren't, I'll answer it.
With the surface of the planet as irregular as it is, and has been for billions of years, no. There is not enough liquid water on earth to completely cover its surface.
If that solid surface were somehow completely smoothed out, the liquid water on it would cover it evenly to a depth of a couple thousand feet.
However, there is ample evidence that the last time that was the case was more than 4 billion years ago. It was ABSOLUTELY not the case at any time remotely within human history.