The Natural Number 66

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Properties of the Number 66

• Because 66 is divisible by 2 ...
• 66 is an even number
• 66 has parity 0
• 66 is not an odd number

• Because 66 can be factored as 2 x 33 ...
• 66 is a composite number
• 66 is not a prime number

Alternative Representations of the Number 66

• Base 2 (binary): 1000010
• Base 8 (octal): 102
• Base 16 (hexadecimal): 42

• Roman numeral: LXVI

• Words: sixty-six

Divisors of the Number 66

• 66 has 8 positive divisors: 1, 2, 3, 6, 11, 22, 33, 66
• The sum of the positive divisors is 144
• 66 has 7 proper divisors: 1, 2, 3, 6, 11, 22, 33
• The sum of the proper divisors is 78

• 66 is not a deficient number
• 66 is not a perfect number
• 66 is an abundant number since the sum of the proper divisors is greater than 66

More Properties of the Number 66

• 66 is not a square number
• 66 is not a cube number

• 66 is a palindromic number (i.e., the digits are the same forwards and backwards)

• 66 is not a Fibonacci number
• 66 is not a Lucas number