  The RENO experiment reports measured flux and energy spectrum of reactor
electron antineutrinos\,($\overline{\nu}_e$) from the six reactors at Hanbit
Nuclear Power Plant. The measurements use
966\,094\,(116\,111)\,$\overline{\nu}_e$ candidate events with a background
fraction of 2.39\%\,(5.13\%), acquired in the near\,(far) detector, from August
2011 to March 2020. The inverse beta decay (IBD) yield is measured as
(5.852$\,\pm\,$0.124$) \times 10^{-43}$\,cm$^2$/fission, corresponding to
0.941\,$\pm$ 0.019 of the prediction by the Huber and Mueller (HM) model. A
reactor $\overline{\nu}_e$ spectrum is obtained by unfolding a measured IBD
prompt spectrum. The obtained neutrino spectrum shows a clear excess around
6\,MeV relative to the HM prediction. The obtained reactor $\overline{\nu}_e$
spectrum will be useful for understanding unknown neutrino properties and
reactor models. The observed discrepancies suggest the next round of precision
measurements and modification of the current reactor $\overline{\nu}_e$ models.
