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Properties of the Number -7866

Eight Hundred Sixty-Six

Basics

Value: -7867 → -7866 → -7865

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 2 × 19 × 23

Divisors: 1, 2, 3, 6, 9, 18, 19, 23, 38, 46

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111010111010

Octal: -17272

Duodecimal: -4676

Hexadecimal: -1eba

Square: 61873956

Square Root: 88.6904729945669

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

Coefficients of denominator polynomials T(n,x) associated with reciprocation. A147986
Expansion of (1-x)-1/(1+x+2·x3). A77906
Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,3. A64238
a(n) = ∑d∣n (n/d)n-d. A342629
a(n) = binomial(2·n,n)*(2·n+1)/2+n·binomial(2·n-2,n)+(n-1)*binomial(2·n-2,n+1). A344228
Coefficients of factor polynomials U(n,x) associated with reciprocation. A147989
a(n) = n*(4·n2 - 3·n + 5)/6. A174723
Coefficients of denominator polynomials Q(n,x) associated with reciprocation. A147988
a(n) = ∑i=0..n digsum7(i)3, where digsum7(i) = A053828(i). A231678
Partial sums of ceiling(n2/4). A175287