The number 661

Representation numerals

Greek numeral

χξαʹ

Arabic numeral

٦٦١

Roman numeral

DCLXI

Maya numeral

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Chinese numeral

六百六十一

Hebrew numeral

תרסא
Numeral systems
Binary: 1010010101
Septimal (base 7): 1633
Octal: 1225
Hexadecimal: 295
Base 24: 13D
Factorization
661 is a prime number
Sums & differences
Sum of 2 squares: 661 = 252 + 62
Difference of 2 squares: 661 = 3312 - 3302
Characteristics
Related primes
The 661th prime number is: 4943
Previous prime number: 659 — Next prime number: 673

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