The Number

1666

One Thousand Six Hundred and Sixty-Six

In Base 11 Undecimal Is

128511

The numbers with a 11 subscript use Base 11 Undecimal notation.

For more familiar numbers: See One Thousand Six Hundred and Sixty-Six in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

1663
128211
One Thousand Six Hundred and Sixty-Three in Base 11 Undecimal
1664
128311
One Thousand Six Hundred and Sixty-Four in Base 11 Undecimal
1665
128411
One Thousand Six Hundred and Sixty-Five in Base 11 Undecimal
1667
128611
One Thousand Six Hundred and Sixty-Seven in Base 11 Undecimal
1668
128711
One Thousand Six Hundred and Sixty-Eight in Base 11 Undecimal
1669
128811
One Thousand Six Hundred and Sixty-Nine in Base 11 Undecimal

Scientific Notation

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

1.666e3

Reciprocal

A number multiplied with its reciprocal is one.

0.0008873a882628638811

The reciprocal of 1666 in Base 11 Undecimal.

Palindrome?

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

The number 128511 is not a palindrome.

Not A Prime Number

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

One thousand six hundred and sixty-six is a composite number with 12 total factors (including 1 and itself).   See primes in Base 11 Undecimal

A Composite

Composites have more than just these two factors.

One thousand six hundred and sixty-six is a composite number with 12 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number one thousand six hundred and sixty-six has the following 3 prime factors:

2
211
Two in Base 11 Undecimal
7
711
Seven in Base 11 Undecimal
17
1611
Seventeen in Base 11 Undecimal

Prime Factorization

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

2111 · 7112 · 16111 = 128511

Base Conversions

The number one thousand six hundred and sixty-six in 35 different bases