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Sixty-sixes is equal to $$6 \lfloor 10^{60} / 9\rfloor$$, or 60 copies of 6:[1]

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 Edit

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]
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 Edit

1. Halm, Michael Joseph. neologisms. Archived from the original on 2014-02-19. Retrieved 2018-02-26.