Properties of the Number 66990

Sixty-Six Thousand Nine Hundred Ninety

Basics

Value: 66989 → 66990 → 66991

Parity: even

Prime: No

Previous Prime: 66977

Next Prime: 67003

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 7 × 11 × 29

Divisors: 1, 2, 3, 5, 6, 7, 10, 11, 14, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10000010110101110

Octal: 202656

Duodecimal: 32926

Hexadecimal: 105ae

Square: 4487660100

Square Root: 258.8242647048379

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

Products of exactly 6 distinct primes. A67885

a(n) = n*(n-1)*(n-2)*(n+3)/12. A117662

Numbers with six distinct prime divisors. A74969

Numbers k such that usigma(k) >= 3·k, where usigma(k) = sum of unitary divisors of k (A034448). A285615

Least positive integer k such that prime(k)-k, prime(k)+k, prime(k·n)-k·n, prime(k·n)+k·n, prime(k)+k·n and prime(k·n)+k are all prime. A259492

T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero. A230840

Number of exterior points formed by extending diagonals of n-gon in general position. A5701

Numbers that appear in A195441 at least once for two consecutive indices. A286763

Positions of records in A246272. A246349

Number of scalars which can be constructed from the Riemann tensor and metric tensor in n dimensions. A50297

We use cookies

Some cookies are essential for Natory to function, like keeping you signed in. We also use optional cookies to understand how the app is used and improve it over time. Learn more in our Privacy Policy. You can manage your preferences anytime.