Sixty-sixes

Sixty-sixes is equal to \(6 \lfloor 10^{60} / 9\rfloor\), or 60 copies of 6:
:666,666,666,666,666,666,666,666,666,666,666,666,666,666,666,666,666,666,666,666 or hypermathematically with interior superscription as \(6^{58}6\)
:googology
Its prime factorization is 2 × 32 × 7 × 11 × 13 × 31 × 37 × 41 × 61 × 101 × 211 × 241 × 271 × 2,161 × 3,541 × 9,091 × 9,901 × 27,961 × 2,906,161 × 4,188,901 × 39,526,741.
== Approximations ==
Notation 	Lower bound 	Upper bound
Scientific notation 	\(6.666\times10^{59}\) 	\(6.667\times10^{59}\)
Arrow notation 	\(74\uparrow32\) 	\(65\uparrow33\)
Steinhaus-Moser Notation 	37[3] 	38[3]
Copy notation 	6[60] 	6[60]
Taro's multivariable Ackermann function	A(3,195) 	A(3,196)
Pound-Star Notation 	#*(1,5,4,5,1,7)*6 	#*(2,5,4,5,1,7)*6
BEAF 	{74,32} 	{65,33}
Hyper-E notation 	6E59 	7E59
Bashicu matrix system 	(0)(0)(0)(0)[5482] 	(0)(0)(0)(0)[5483]
Hyperfactorial array notation 	47! 	48!
Fast-growing hierarchy 	\(f_2(191)\) 	\(f_2(192)\)
Hardy hierarchy 	\(H_{\omega^2}(191)\) 	\(H_{\omega^2}(192)\)
Slow-growing hierarchy 	\(g_{\omega^{37}9}(39)\)	\(g_{\omega^{\omega+6}4}(33)\)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Even numbers
Category:Numbers by André Joyce
Category:Numbers with 30 to 100 digits
Category:Repdigit numbers