Answer:
By definition, an atheist believes in no god (a-theist=no-god). This would include ancient deities (Thor, Anubis or the Snake Dress Woman) as well as modern and contemporary deities (Allah, Jesus, the Great Spaghetti Monster)
No, atheists do not believe in "God". Atheism is a lack of a belief in gods.
Yes, they believe there is no God or gods.
There are over 700 million atheists worldwide and are growing year by year.
Atheists do not believe in a god/gods or higher power. Agnostics do believe in a god/gods but believe their/its existence or lack thereof can not be proven. This does not imply the lack of a religion as by this classification Buddhists are atheists.
Theists are those who believe in existence of a god or gods as creator(s) and ruler(s) of the universe. Atheists do not believe in gods, but instead know that the universe is bound by natural laws. The workings of our world is explained through scientific observation.
We do't believe in gods, demons, angels, ghosts, afterlife, reincarnation, unicorns, elves, gobblins, or anything supernatural.
People have different faiths so they believe in different Gods. If people don't believe in God they are Atheists.
An athiest is a person who doesnt believe in god/gods. So no, they don't have a religion.
Atheism has no theory. We simply disbelieve in any gods or other supernatural beings.
Atheists do not believe there is a division between God and humanity since atheists lack any belief in gods they do not spend time thinking of such matters. A theist can answer the second part of the question.
Atheism is the absence of belief in gods. Atheists do not pray.
Atheists can believe whatever they want about any subject (except the existence of gods). Atheism does not have any sort of dogma and therefore atheists do not have to agree on any other issue. But most atheists who would also identify as a skeptic (The new atheism Richard Dawkins camp) would not believe in ghosts.