Properties of the Number 6671

Six Thousand Six Hundred Seventy-One

Basics

Value: 6670 → 6671 → 6672

Parity: odd

Prime: No

Previous Prime: 6661

Next Prime: 6673

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 953

Divisors: 1, 7, 953, 6671

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1101000001111

Octal: 15017

Duodecimal: 3A3B

Hexadecimal: 1a0f

Square: 44502241

Square Root: 81.67618992093105

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 primes between n·100000 and (n+1)*100000. A38825

a(n) = (9n² + 9n + 4)/2. A62123

Coefficients of the '6th-order' mock θ function σ(q). A53271

Squarefree n such that the elliptic curve n·y² = x³ - x arising in the "congruent number" problem has rank 3. A62693

Absolute value of coefficient of X² in the characteristic polynomial of the n-th power of the matrix M = {{1,1,1,1,1}, {1,0,0,0,0}, {0,1,0,0,0}, {0,0,1,0,0}, {0,0,0,1,0}}. A123126

Beastly fax numbers: numbers containing the fax number of the Beast (667, one more than its regular number) in their decimal expansion. A138563

a(n) = 8·n² - 2·n + 1. A185438

G.f.: ∑_k>=0 x^k² / ∏_j=1..k (1 - x^2·j-1)². A376581

a(n) = (n³ + 18·n² + 17·n + 6)/6. A143058

Where records occur in A217287. A217289