1661 (number)

1661 is an odd 4-digits composite number following 1660 and preceding 1662. In scientific notation, it is written as 1.661 × 10^3. The sum of its digits is 14. It has a total of 2 prime factors and 4 positive divisors. There are 1500 positive integers (up to 1661) that are relatively prime to 1661.

Interesting facts

Basic properties

Name

Name one thousand six hundred sixty-one

Notation

Scientific notation 1.661 × 10^3
Engineering notation 1.661 × 10^3

Prime Factorization of 1661

Prime Factorization 11 × 151

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 1661
Product of the distinct prime numbers

The prime factorization of 1661 is 11 × 151. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 1, 32, 74, 220, 487, 3435, 2486, 29771, 54190, 74606, 899943, 4723721, 3062361, 8383175, 16008193, 69941276, 913708859, 41905536, 328380649

Basic calculations (n = 1661)

Multiplication

n×y
n×2 3322
n×3 4983
n×4 6644
n×5 8305

Division

n÷y
n÷2 830.5
n÷3 553.66666666667
n÷3 415.25
n÷5 332.2

Exponentiation

ny
n2 2758921
n3 4582567781
n4 7611645084241
n5 12642942484924301

Nth Root

y√n
2√n 40.75536774463
3√n 11.84285860488
4√n 6.3839930877649
5√n 4.4062986203475

Divisors of 1661

1, 11, 151, 1661

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -1660
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 1661 can be divided by 4 positive divisors. The sum of these divisors (counting 1661) is 1, the average is 0.25.

Base conversion 1661

Base System Value
2 Binary 11001111101
3 Ternary 2021112
4 Quaternary 121331
5 Quinary 23121
6 Senary 11405
8 Octal 3175
10 Decimal 1661
12 Duodecimal b65
16 Hexadecimal 67d
20 Vigesimal 431
36 Base36 1a5

Cryptographic Hash Functions

md5 7d12b66d3df6af8d429c1a357d8b9e1a
sha1 5c5a56a1d11d0a2e27797f751519fa1fdaa28e16
sha256 8429476daf79869660e1228853868ae86ae9ec97893d38ae2be5ac85618d9082
sha512 c877003735c8ad7e442384f40584d4d42b317d4f3e2c0d17d50ac82b4061966995c306c411b5fbb74cb6a0373b1493d3f3bafa4e85ce35a1921d028a4bd322c4
ripemd-160 56672de290e5d915ea259e8fc84d33352e87e748

1661 as geometric shapes

Circle

Radius = n
Diameter 3322
Circumference 10436.370795225
Area 8667405.9454346

Sphere

Radius = n
Volume 19195415033.823
Surface area 34669623.781738
Circumference 10436.370795225

Square

Length = n
Perimeter 6644
Area 2758921
Diagonal 2349.0087271017

Cube

Length = n
Surface area 16553526
Volume 4582567781
Space diagonal 2876.9363913719

Equilateral Triangle

Length = n
Perimeter 4983
Area 1194647.8365172
Altitude 1438.468195686

Triangular Pyramid

Length = n
Surface area 1194647.8365172
Volume 540060792.19868
Height 783.0029090339