Open SCOM operation console.You can click on help option and check the product version.
You can check the build number from below link
Powershell to check the SCOM version
You can use below command to view SCOM current version.You have to run the below command in operation shell
How to check SCOM agent version and UR
You can go to SCOM operation console and click to Agent by version. there you able to see SCOM agent details.
You can customise the view as per your requirement.