And I contend that atheists do have at least one god -- and multiples one usually.
Two examples just from the New Testament:
* "For, as I have often told you before and now tell you again even with tears, many live as enemies of the cross of Christ. Their destiny is destruction, their god is their stomach, and their glory is in their shame. Their mind is set on earthly things." (Phillippians 3:18)
A glutton's god can be his/her tummy.
* 5 Put to death, therefore, whatever belongs to your earthly nature: sexual immorality, impurity, lust, evil desires and greed, which is idolatry." (Colossians 3:5)
Greed can also be an atheist's "replacement" God.
It can also be lust. Or just self-worship in general.
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Aside from then this being simply a "mathematical" issue -- as your quote portends -- with Mormonism 'tis also an entirely different GOD altogether.