The following information was obtained from Number Gossip by Tanya Khovanova:
Number  Property Description  Comments 
9001 
APOCALYPTIC POWER The number $\,n\,$ is called an apocalyptic power if $\,2^n\,$ contains the consecutive digits $\,666\,$ (in decimal). Notes:

Go to
http://www.wolframalpha.com
and type in $\,2^{9001}\,$ (enter it as 2^9001 ).Here are the first few digits of the resulting number: 361,763,240,328,300,322,619,510, 666,362,... 