Yes chapter 65 is out in Japan already. And people are working on getting the raws. For some reason public raws for 666 Satan from the Monthly Shounen Gangan scans are hard to come by. It is possible that we will see chapter 65 raw before chapter 64 but after that things should be more regular since I now have a subscription to the magazine and will be scanning for public use. Though the raws for 666 Satan will still be later than the public raws for FMA which is in the same magazine since there is a shipping time involved of 1.5 to 2 weeks from the release in Japan.
64 rw is out at mangahelpers.now hopefully next week we'll have a trans maybe even a scan