664

663 ← 664 → 665
읽는 법육백육십사
세는 법육백예순넷
한자六百六十四
소인수 분해23× 83
로마 숫자DCLXIV
2진수10100110002
3진수2201213
4진수221204
5진수101245
6진수30246
8진수12308
12진수47412
16진수29816
20진수1D420
36진수IG36
φ(664)328
σ*(664)756
d(664)8
σ(664)1260
μ(664)0
M(664)-12
수 목록 · 정수

664(육백육십사)는 663보다 크고 665보다 작은 자연수다.

수학

  • 합성수로, 그 약수1, 2, 4, 8, 83, 166, 332, 664다. 진약수의 합596이므로, 664는 부족수다.
    • 공차가 6인 네 자연수의 제곱합으로 나타낼 수 있는 수다. 이 성질을 지닌 앞의 수는 580, 다음 수는 756이다.

과학

교통

군사

문화유산

기타

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