/usr/lib/linux-tools/4.13.0-16-lowlatency/cpupower is in linux-tools-4.13.0-16-lowlatency 4.13.0-16.19~16.04.3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/4.13.0-16-lowlatency/../../linux-hwe-edge-tools-4.13.0-16/cpupower