Nearby Numbers

Positive, nonzero integers within three units

63

Sixty-Three

64

Sixty-Four

65

Sixty-Five

67

Sixty-Seven

68

Sixty-Eight

69

Sixty-Nine

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

6.6e1

Reciprocal

A number multiplied with its reciprocal is one.

0.015151515151515152

The reciprocal of 66.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 66 is a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Sixty-six is a composite number with 8 total factors (including 1 and itself).   See primes in Base 10 Decimal

A Composite

Composites have more than just these two factors.

Sixty-six is a composite number with 8 total factors (including 1 and itself).

Prime Factors

2

Two

3

Three

11

Eleven

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

21 · 31 · 111 = 66

Base Conversions

The number sixty-six in 35 different bases