Actually, that's more likely the odds of you doing your sums right.
But just for a laugh let's apply "creation math" to the problem of God's existence.
Now "creation math" doesn't allow for any gradual accumulation of traits, no-siree. It's got to be one tornado, blowing through one junkyard and building at least one 747. So let's say there is a god, how powerful will that god be? Well he could be very powerful like apollo, very-very powerful like Zeus, semi-powerful like Heracles, etc. In fact he could have any amount of power at all. But you say he happens to have infinite power. But the chances of a god having infinite power out of all the amounts of power he could have is 1/oo!
Now how much knowledge does he have? Well I suppose he could be anything from an insensible, mad, idiot god to - i don't know - omniscient? What you're god is omniscient too? Well the odds of that are 1/oo!
Finally, how nice a god is he? I mean some gods are pretty mean, some are downright evil, most are pretty capricious, but I guess a few are okay for the most part. Wait, you say your god is omnibenevolent? So he's not the god of the bible then! (Haha, just joking (not).) Wow so of all the nicenesses he could have had he chose infinity again? That's another 1/oo!
So now we are in a position to work out just how likely it is that there is a omnipotent, omniscient, omnibenevolent god...
1/oo x 1/oo x 1/oo = ...
(Just let me double check...)
...0!
Yes! There's still no fucking chance!
Of course, having now proved this with math, you will immediately abandon all faith and join us on the dark side, right? I mean, who can argue with math?!