No, there is no numerical value at this time for the amount of Hubbers you follow. I have been hoping for the same thing! If you want to filter the Hubbers or Hubs you follow so that you can delete some, follow these instructions:
Click "My Account" on the top right of the page.
Click "Following" in the middle of the top of that page.
On the left there is a box: Click "Hubbers I Follow"
There are several options for the way you can filter: either by most recent Hubs published by people you follow, or by the Hubbers themselves, alphabetically. You can also unfollow Hubs you follow as well using the same method.
I hope this helps!