/usr/lib/linux-tools/3.16.0-25-lowlatency/cpupower is in linux-tools-3.16.0-25-lowlatency 3.16.0-25.33~14.04.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/3.16.0-25-lowlatency/../../linux-lts-utopic-tools-3.16.0-25/cpupower