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Properties of the Number 6649

Six Thousand Six Hundred Forty-Nine

Basics

Value: 6648 → 6649 → 6650

Parity: odd

Prime: No

Previous Prime: 6637

Next Prime: 6653

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 61 × 109

Divisors: 1, 61, 109, 6649

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1100111111001

Octal: 14771

Duodecimal: 3A21

Hexadecimal: 19f9

Square: 44209201

Square Root: 81.54140052758476

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

Semiprimes with semiprime digits (digits 4, 6, 9 only). A107342
Number of "ON" cells after n-th stage in simple 2-dimensional cellular automaton (see Comments for precise definition). A160117
T(n,k)=Number of zero-sum -k..k arrays of n elements with first through third differences also in -k..k. A202511
Number of squares on infinite chessboard at <= n knight's moves from a fixed square. A18836
a(1) = 14, a(n) = smallest number > a(n-1) such that the concatenation of a(n-1) and a(n) is a square. A265152
Generalized Fibonacci numbers An,3. A6208
Number of legal Go positions on a 1 X n board (for which 3n is a trivial upper bound). A102620
Squarefree numbers differing by more than 2 from any other squarefree number. A268331
Triangle read by rows: a(1,1) = 1. a(m,m) = sum of all terms in rows 1 through m-1. a(m,n) = a(m-1,n) + (sum of all terms in rows 1 through m-1), for n < m. A159927
Numbers n such that φ(n) = 3*φ(n+1). A256907