An apocalypse number is a number having 666 digits (where
666 is the beast number ).
The Fibonacci number
Apocalypse primes are given by A115983 ). The smallest
apocalypse prime containing the digits 666 is
See also Apocalyptic Number ,
Beast Number ,
Evil Number ,
Legion's
Numbers ,
Leviathan Number
Explore with Wolfram|Alpha
References Livio, M. The Golden Ratio: The Story of Phi, the World's Most Astonishing Number. Numberphile. Featuring T. Padilla.
"Interesting 666-Digit Numbers." Apr. 8, 2024. https://www.youtube.com/watch?v=KXO2l7Kh60A . Pickover,
C. A. Keys
to Infinity. Pickover,
C. A. "Apocalyptic Numbers." Ch. 72 in Wonders
of Numbers: Adventures in Mathematics, Mind, and Meaning. Rupinski, A. "10000...66657
(666-digits)." https://t5k.org/curios/page.php?number_id=2690 . Sloane,
N. J. A. Sequence A115983 in "The
On-Line Encyclopedia of Integer Sequences." Referenced on Wolfram|Alpha Apocalypse Number
Cite this as:
Weisstein, Eric W. "Apocalypse Number."
From MathWorld https://mathworld.wolfram.com/ApocalypseNumber.html
Subject classifications More... Less...
is the smallest Fibonacci apocalypse number (Livio
2002, p. 108).
for 
, 1837, 6409, 7329, 8569,
8967, 9663, ... (OEIS A115983). The smallest
apocalypse prime containing the digits 666 is 
(Rupinski).
