The Number
665
Six Hundred and Sixty-Five
In Base 11 Undecimal Is
55511
The numbers with a 11 subscript use Base 11 Undecimal notation.
For more familiar numbers: See Six Hundred and Sixty-Five in Base 10 Decimal
Nearby Numbers
Positive, nonzero integers within three units
Scientific Notation
Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.
6.65e2
Reciprocal
A number multiplied with its reciprocal is one.
0.00200200200200200311
The reciprocal of 665 in Base 11 Undecimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 55511 is a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Six hundred and sixty-five is a composite number with 8 total factors (including 1 and itself). See primes in Base 11 Undecimal
A Composite
Composites have more than just these two factors.
Six hundred and sixty-five is a composite number with 8 total factors (including 1 and itself).
Prime Factors
The number six hundred and sixty-five has the following 3 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
5111
·
7111
·
18111
= 55511
Base Conversions
The number six hundred and sixty-five in 35 different bases