/usr/lib/x86_64-linux-gnu/libi2c.so is in libi2c-dev 4.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libi2c.so.0
/usr/lib/x86_64-linux-gnu/libi2c.so.0