| Base | Representation |
|---|---|
| bin | 111101111011101110… |
| … | …000111111011010100 |
| 3 | 20100122111212002020000 |
| 4 | 331323232013323110 |
| 5 | 2042143022314400 |
| 6 | 50314430011300 |
| 7 | 4542636233400 |
| oct | 757356077324 |
| 9 | 210574762200 |
| 10 | 66500198100 |
| 11 | 262256a0106 |
| 12 | 10a7a946b30 |
| 13 | 636a34a25b |
| 14 | 330bcaa100 |
| 15 | 1ae3242600 |
| hex | f7bb87ed4 |
66500198100 has 540 divisors, whose sum is σ = 252873815040. Its totient is φ = 15072220800.
The previous prime is 66500198099. The next prime is 66500198101. The reversal of 66500198100 is 189100566.
66500198100 is a `hidden beast` number, since 66 + 500 + 1 + 98 + 1 + 0 + 0 = 666.
It is an interprime number because it is at equal distance from previous prime (66500198099) and next prime (66500198101).
It is a tau number, because it is divible by the number of its divisors (540).
It is a super-2 number, since 2×665001981002 (a number of 22 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (66500198101) by changing a digit.
It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 51993261 + ... + 51994539.
Almost surely, 266500198100 is an apocalyptic number.
66500198100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 66500198100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126436907520).
66500198100 is an abundant number, since it is smaller than the sum of its proper divisors (186373616940).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66500198100 is a wasteful number, since it uses less digits than its factorization.
66500198100 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1450 (or 1427 counting only the distinct ones).
The product of its (nonzero) digits is 12960, while the sum is 36.
Adding to 66500198100 its reverse (189100566), we get a palindrome (66689298666).
The spelling of 66500198100 in words is "sixty-six billion, five hundred million, one hundred ninety-eight thousand, one hundred".
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