Took me a while to narrow it down but wanted to share the info in case you freaked out like I did at first.
going directly to 682126721867.apps.googleusercontent.com did not reveal any information.
Doing a WHOIS 18.104.22.168 returned Amazon as the host. I didn’t approve any amazon apps within google or gmail?
After doing an exact search on “682126721867.apps.googleusercontent.com”, it revealed a couple of youtube videos and questionable pages. After watching one video, it later revealed that Authorized Application was Cirrus Insight, a plug-in for gmail to sync your salesforce Accounts, Contacts, Cases, etc.
Phew….ok. All good. Move along…nothing to see here.