Is 165aBmgtQJFDLkSYPU5C8jq5gpnAtHdKBh a scam Bitcoin address? Is this bitcoin address authentic: 165aBmgtQJFDLkSYPU5C8jq5gpnAtHdKBh

I sent BTC to the address for Paypal funding but no response from them since yesterday.
There is no way to know.  Bitcoin addresses are designed to be used only once.  As you can see here, nobody except you has ever sent coins to that address, and in all likelihood nobody else ever will.  And Bitcoin addresses are anonymous, so it is likely to be difficult to trace the address to its owner.