Properties of the Number 66849

Sixty-Six Thousand Eight Hundred Forty-Nine

Basics

Value: 66848 → 66849 → 66850

Parity: odd

Prime: No

Previous Prime: 66841

Next Prime: 66851

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 22283

Divisors: 1, 3, 22283, 66849

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010100100001

Octal: 202441

Duodecimal: 32829

Hexadecimal: 10521

Square: 4468788801

Square Root: 258.5517356352496

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of subsets of {1..n} containing no differences or quotients of pairs of distinct elements. A326490

Expansion of e.g.f. exp(arctanh(arctanh(x))). A12263

Number of (n+1) X 3 binary arrays with rows and columns in nondecreasing order and with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one. A184064

sec(arcsin(arctanh(x)))=1+1/2!*x²+17/4!*x⁴+769/6!*x⁶+66849/8!*x⁸... A12144

Consider sequence of fractions A066657/A066658 produced by ratios of terms in A066720; let m = smallest integer such that all fractions 1/n, 2/n, ..., (n-1)/n have appeared when we reach A066720(m) = k; sequence gives values of m; set a(n) = -1 if some fraction i/n never appears. A66849

Number of (n+1)X(3+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction. A250522