Wednesday, June 23, 2010

658

658 = 2 x 7 x 47.

658 is the number of triangles of any size contained in the triangle of side 13 on a triangular grid.


A zero is located at the 658th position in the decimal expansion of pi.

658 is the sum of six positive cubes in exactly three ways.

PT-658, built in 1945, is a historic naval ship now being restored, in Portland, Ore.

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1 comment:

  1. AnonymousJune 23, 2010 at 12:34 PM

    658 otras propiedades:
    658 divide a 95^3-1
    658=3^6-71
    658^2=2258^2-2160^2
    658^2=108242^2-108240^2
    658^3=216811^2-216153^2
    658^4=142445485^2-14244827^2
    658^5=142661638^2-142228674^2
    Rafael Parra de Barcelona

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