/usr/lib/x86_64-linux-gnu/libudev.so is in libudev-dev 229-4ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libudev.so.1.6.4
/lib/x86_64-linux-gnu/libudev.so.1.6.4