Number 66, ξϛʹ

Representation numerals

Greek numeral

ξϛʹ

Arabic numeral

٦٦

Roman numeral

LXVI

Maya numeral

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Chinese numeral

六十六

Hebrew numeral

סו

Numeral systems

Binary: 1000010

Septimal (base 7): 123

Octal: 102

Hexadecimal: 42

Base 24: 2I

Factorization

66 = 2 × 3 × 11

66 has 8 divisors: 1, 2, 3, 6, 11, 22, 33, 66

Sum of all divisors other than 66: 78

Sums & differences

Goldbach conjecture: 66 = 61 + 5 = 59 + 7 = 53 + 13 = 47 + 19 = 43 + 23 = 37 + 29

Characteristics

66 is a triangular number
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The next triangular is: 78

66 is a hexagonal number

66 is a palindromic number in decimal system

Related primes

The 66th prime number is: 317