The Annunaki are the most powerful gods of the Mesopotamian pantheon.
Their leader is Anu. The other members are his offspring. Both their power
and their bloodline set them apart from the other gods. In the Sumerian
creation myth, they are clearly superior to the Igigi, as they ordered them to
take on the hard work of shaping the world. They are also responsible for the creation of mankind.
What they had in power, the Annunaki obviously lacked in creativity. The
term Annunaki simply refers to the fact that most of its members are of the
bloodline of Anu and Ki: Enlil, Enki, Ninhursag, Nanna, Utu, and Innana.