The filename is image_675. When I hover over it with the mouse, I get the following in the lower left (address bar?): babeid.com/filedata/fetch?id=6010&d=1394949081
I wasn't sure if the 6010 was the ID in Indexxx, and couldn't find it that way anyhow.
I found the set this came from (or part of it) with a Tineye search about 6 weeks ago, but only downloaded the image you posted (which doesn't have the close up insets). When I tried to go back a week later, it had been taken down. The filename on the one I downloaded was 14, but that might not be original.
Thanks,
Angus