Properties of the Number 1660

One Thousand Six Hundred Sixty

Basics

Value: 1659 → 1660 → 1661

Parity: even

Prime: No

Previous Prime: 1657

Next Prime: 1663

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 83

Divisors: 1, 2, 4, 5, 10, 20, 83, 166, 332, 415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001111100

Octal: 3174

Duodecimal: B64

Hexadecimal: 67c

Square: 2755600

Square Root: 40.74309757492672

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

Coordination sequence T1 for Zeolite Code ABW and ATN. A8000

Generalized 10-gonal numbers: m*(4·m - 3) for m = 0, +- 1, +- 2, +- 3, ... A74377

a(n) is the limiting term of the n-th column of the triangle in A188919. A188920

Second 10-gonal (or decagonal) numbers: n*(4·n+3). A33954

Number of integer partitions of n whose product is a perfect power. A320322

The main column of a version of the square spiral. A156859

Expansion of 1/(1 - x - x⁸ - x¹⁵ + x¹⁶). A173925

a(n) = n*(5·n² - 2)/3. A4466

Numbers m such that there are precisely 11 groups of order m. A249554

Numbers where 6 outnumbers any other digit. A292456