The number 66

Representation numerals

Greek numeral

ξϛʹ

Arabic numeral

٦٦

Roman numeral

LXVI

Maya numeral

●●●

▃▃▃▃▃

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
Previous prime number: 61 — Next prime number: 67
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