Apocalypenta numbers are numbers of the form 5n containing the digits 666 in their decimal expansions.[1]
³5 is an apocalypenta number.
...994,868,619,954,314,766,693,801,303,717,616,359...
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Specific numbers: Beast number · Belphegor's prime · Legion's number of the first kind · Super-leviathan · Legion's number of the second kind · Leviathan number
Forms of numbers: apocalypse number · apocalyptic number · apocalyptri number · apocalyptetra number · apocalypenta number · apocalyhexakosioihexekontahexa number · Goliath number