Properties of the Number -670

Six Hundred Seventy

Basics

Value: -671 → -670 → -669

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 67

Divisors: 1, 2, 5, 10, 67, 134, 335, 670

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010011110

Octal: -1236

Duodecimal: -47A

Hexadecimal: -29e

Square: 448900

Square Root: 25.88435821108957

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

Recurrence a(n+2) = ∑_k=0..n binomial(n,k)*a(k)*a(n+1-k) with a(0)=1, a(1)=-2. A289068

∏_k>=1 ((1 + x^k)^a(k)) = 1 + 4x. A38069

Expansion of ∏_k>=1 ((1 - k·x^k) / (1 - x^k)). A267005

Expansion of 1/(2 - ∏_k>=1 1/(1 + x^k)). A307060

Coefficient array for powers of x² of polynomials appearing in a generalized Melham conjecture on alternating sums of fifth powers of Chebyshev S polynomials with odd indices. A220671

a(n) = H_n(1) / 2^floor(n/2) where H_n is the n-th Hermite polynomial. A25165

a(n) = ∑_i=n-4..n-1 (-1)ⁱ*a(i), a(1)=1, a(2)=1, a(3)=1, a(4)=1. A51793

Site series for first perpendicular moment of 4.8 (bathroom tile) lattice. A120560

Triangular sequence from coefficients of characteristic polynomial of n X n prime element matrices: M=A.B.A^-1; (A(3) is singular): examples; A(4)= {{2, 3, 5, 7, 11}, {3, 5, 7, 11, 13}, {5, 7, 11, 13, 17}, {7, 11, 13, 17, 19}, {11, 13, 17, 19, 23}} B(4)= {{3, 5, 7, 11, 13}, {5, 7, 11, 13, 17}, {7, 11, 13, 17, 19}, {11, 13, 17, 19, 23}, {13, 17, 19, 23, 29}}. A137405

Octahedral numbers: a(n) = n*(2·n² + 1)/3. A5900