integers.info
Six hundred and sixty-one
661 in other numeral systems
Binary
:
1010010101
Octal
:
1225
Hex
:
295
Roman
:
DCLXI
Prime factorization of 661
661 is a prime number
Divisors of 661
1
and
661
Is 661 in the Fibonacci number sequence?
No.
Its nearest Fibonacci number neighbors are
610
and
987
.