Recognised as Decimal number

666.666666665

Positive
Decimal
9 d.p.
12 s.f.

666.666667 is a decimal number equal to approximately 2,000⁄3. It lies between 666 and 667, and as a percentage it is 66,666.666666%.

Number properties

Absolute value666.666667

SignPositive

Integer part666

Fractional part0.666666665

Decimal places9

Floor666

Ceiling667

Rounded to nearest667

Truncated666

Fractions & ratios

As a fraction2,000/3≈≈ 666.666666666667

Ratio2,000 : 3

As a percentage66,666.666666%

Reciprocal0.0015≈

Arithmetic

Double1,333.333333

Half333.333333

Square444,444.444442

Cube296,296,296.294074

Square root25.8198889747≈

Cube root8.7358046474≈

Negation-666.666667

Natural logarithm6.5022901709≈

Logarithm base 102.8239087409≈

Representations

Decimal666.666666665

Scientific notation6.66666667 × 10^2

Exponential6.66666666665e+2

IEEE 754 binary64 (hex)0x4084D55555551C11the exact 64-bit pattern stored

IEEE 754 binary32 (hex)0x4426AAAB32-bit single precision, may lose accuracy

Stored as666.666666665the nearest binary64 value to what you typed

Rounding & precision

Significant figures as written12counted from the digits as typed, not from the value

To 0 decimal places667

To 1 decimal place666.7

To 2 decimal places666.67

To 3 decimal places666.667

To 4 decimal places666.6667

To 1 significant figure7e+2

To 2 significant figures6.7e+2

To 3 significant figures667

To 4 significant figures666.7

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