Can anyone direct me to the link to download 64-bit Adobe reader installer (not the .msp)
Hope you are doing well.
Try downloading the installer from here https://helpx.adobe.com/reader/get-started.html it should automatically be 64-bit.
If this doesn't help, use this link and select All Languages (MUI) to get both the installers in dropdown 32-bit and 64-bit.
Hope this helps.