Weird app that always opens up when I open phone, cannot be uninstalled

Okay so recently I downloaded an apk. I installed the app but it wasn't what I was looking for. It gives me ads and stuff. It can't be found on my home screen but when I check my applications through settings there's this app with no name that I can't uninstall. Everytime I open my phone the app automatically opens. Any idea how to remove it? I've tried scanning my phone for viruses but my phone says there is none. Thanks!

Also one time the ad didn't load and I saw the link like ** LINK REMOVED BY MODERATOR**

Hopefully I explained it well. Thanks in advanced :)

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