$ sudo apt-get update
$ sudo apt-get install libatkmm-1.6-1 

libatkmm-1.6-1 is installed in your system.

Make ensure the libatkmm-1.6-1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libatkmm-1.6-1 *

You will get with libatkmm-1.6-1 package name, version, architecture and description in a table

libatkmm-1.6-1 package basic information: