| Base | Representation |
|---|---|
| bin | 1111111000010… |
| … | …0100011101000 |
| 3 | 11122022210110200 |
| 4 | 3332010203220 |
| 5 | 114022300430 |
| 6 | 10335312200 |
| 7 | 1436055354 |
| oct | 376044350 |
| 9 | 148283420 |
| 10 | 66603240 |
| 11 | 34661000 |
| 12 | 1a37b660 |
| 13 | 10a4c702 |
| 14 | 8bba464 |
| 15 | 5ca9460 |
| hex | 3f848e8 |
66603240 has 192 divisors, whose sum is σ = 239803200. Its totient is φ = 16030080.
The previous prime is 66603233. The next prime is 66603247. The reversal of 66603240 is 4230666.
66603240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (66603233) and next prime (66603247).
It is not an unprimeable number, because it can be changed into a prime (66603247) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 479091 + ... + 479229.
It is an arithmetic number, because the mean of its divisors is an integer number (1248975).
Almost surely, 266603240 is an apocalyptic number.
66603240 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 66603240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119901600).
66603240 is an abundant number, since it is smaller than the sum of its proper divisors (173199960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66603240 is a wasteful number, since it uses less digits than its factorization.
66603240 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 189 (or 160 counting only the distinct ones).
The product of its (nonzero) digits is 5184, while the sum is 27.
The square root of 66603240 is about 8161.0808107750. The cubic root of 66603240 is about 405.3515009699.
It can be divided in two parts, 66 and 603240, that added together give a palindrome (603306).
The spelling of 66603240 in words is "sixty-six million, six hundred three thousand, two hundred forty".
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