/usr/lib/x86_64-linux-gnu/libpgtypes.so.3 is in libpgtypes3 9.5.14-0ubuntu0.16.04.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpgtypes.so.3.6
/usr/lib/x86_64-linux-gnu/libpgtypes.so.3.6