WWE, WHC, IC, US, Tag, Divas... so, 6?

That's just off the top of my head, so I could be wrong. That's actually less than I thought, but then I remembered that they combined the Tag and Women's belts a while back. Really, if they wanted to end the brand split once and for all, they'd only need to ditch the WHC and US titles, neither of which would be a huge loss.