844-699-3623

Got a scam text with this number to call back for a loan I never applied for.

Forward unwanted spam/scam texts to 7726 (SPAM) and let your phone service provider deal with them.
That number was set up by the phone companies to combat spam/scam texts and they can shutdown offending phone numbers.
Never reply with "STOP", scammers will not honor the request (they have no honor to begin with) and it only verifies that they have texted to a valid number with a person who reads their texts.  It will not STOP the texts and may actually make them more frequent.
Never click on a link in such a text as it may cause malware to be inserted on your phone, and even if it does not, just as with replying "STOP" the scammers will know they reached a valid number.
Do not repost any links included in the text message to public sites such as this one.  It may subject others to malware if they click on it or, in some cases, it may reveal personal information posted on the target site of the link.  Links that are a domain followed by a string of characters and digits (e.g., "somedomain.com/AbC1d34q") are specific to the text recipient.  If the link is followed, the sender will know and assume the intended recipient clicked on it, which may lead to more texts being sent.

Also, report them at:
ReportFraudFTC.gov

It’s a text spam with the digits of 401-58 (40158). Claiming that they need to speak to you about a loan you applied for and to call the number 1-844-699-3623. Do not call the number. If you search it, you will find that some people have reported the number as fraudulent to the BBB. Forward the number to 7726, so they block it with all phone companies.