  Making use of the data obtained from Kepler satellite, we have analysed an
F-type ultra-fast rotator KIC 6791060. We derive a rotational period of
0.34365$\pm$0.00004 d. Multiple periodicity with a period separation of
$\sim$0.00016 d was detected, which appears to be a result of the relative
velocity between the multiple spot-groups in different stellar latitudes due to
surface differential rotation. During the observations, 38 optical flares are
detected. Energies of these flares have been found to be in the range of
$10^{31-33}$ erg. Preliminary results of surface temperature modeling indicate
the existence of two active longitudes on the stellar surface.
