64 (number) it is possible to find sequences of 64 consecutive integers such that each inner member shares a factor with either the first or the last member, 64 is an Erdős–Woods number. In base 10, no integer added up to its own digits yields 64, hence it is a self number. 64 is a superperfect number—a number such that σ(σ("n")) = 2"n". 64 is the index of Graham's number in the rapidly growing sequence 3↑↑↑↑3, 3 ↑ 3,… Sixty-four is: 64 (number) 64 (sixty-four) is the natural number following 63 and preceding 65. Sixty-four is the square of 8, the cube
26 (number) simple way as a subquotient. Twenty-six is a repdigit in base three (222) and in base twelve (22). In base ten, 26 is the smallest number that is not a palindrome to have a square (26 = 676) that is a palindrome. Twenty-six is: 26 (number) 26 (twenty-six) is the natural number following 25 and preceding 27. 26 is the only integer that is one greater than a square (5 + 1) and one less than a cube (3 − 1). A rhombicuboctahedron has twenty-six faces. When a 3 × 3 × 3 cube is made of twenty-seven unit cubes,