27

27 (twenty-seven) is a positive integer following 26 and preceding 28. Its ordinal form is written "27th" or "twenty-seventh".
In googology, it is called boogathree or fzthree.
== Properties ==
*27 is an and a perfect power .
*27 is the 3rd .OEIS, Sequence A000578. Accessed 2021-06-01.]
== In googology ==
*In Greek-based number-naming systems, 27 is associated with prefix "heptaicosa-", and with prefix "septemviginti-" in Latin systems.
*27 is equal to triangle(3) in Steinhaus-Moser notation.
*27 can be named "boogathree" with the booga- prefix or "fzthree" with the fz- prefix.
*Since 27 is equal to 3 3-ated to 3 ({3, 3, 3} in the old version of BEAF), it occurs naturally when plugging threes into googological functions based on hyper-operators. For example, tritri is a power tower of threes.
*Aarex Tiaokhiao coined microhal for this number, and is equal to G(1,1) = G(0,1) = 3↑3 using Aarex's Graham Generator.Forcal - Aarex's Large Numbers (archived 2016-04-11)
*HaydenTheGoogologist2009 coined Hayden's Tritri for this number, and is equal to 3(3)3 = 3↑3 using Hayden's Array Notation.Hayden's Big Numbers. Retrieved 2022-04-17.
*RedBandServerYT coined Hypertri for this number.Numbers using Hayden's Array Notation. Retrieved May 1, 2022.
=== Googological functions returning 27 ===
* Tetrofactorial: \(3!2=27\)
*Slow-growing hierarchy: \(g_{\omega^{\omega}}(3)\)
*Arrow notation: \(3\uparrow\uparrow 2\)
== In popular culture ==
In songs by parody artist the number 27 appears more than would be expected, it was in fact coincidental at first but when it was brought to his attention Weird Al decided to deliberately insert references whenever possible to the number.
==Sources==
== See also ==
Category:Numbers
Category:Class 1
Category:Numbers 0-99
Category:Numbers with 1 to 2 digits
Category:Powers of 3
Category:Fz-
Category:Booga-
Category:Doogol Regiment