Base | Representation |
---|---|
bin | 1111111110000… |
… | …0111000111000 |
3 | 11200001000020210 |
4 | 3333200320320 |
5 | 114121401212 |
6 | 10351351120 |
7 | 1442222100 |
oct | 377407070 |
9 | 150030223 |
10 | 66981432 |
11 | 3489a161 |
12 | 1a5224a0 |
13 | 10b528ab |
14 | 8c78200 |
15 | 5d3153c |
hex | 3fe0e38 |
66981432 has 48 divisors (see below), whose sum is σ = 194796360. Its totient is φ = 19137216.
The previous prime is 66981389. The next prime is 66981449. The reversal of 66981432 is 23418966.
It is a zygodrome in base 2.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27303 + ... + 29654.
Almost surely, 266981432 is an apocalyptic number.
It is an amenable number.
66981432 is an abundant number, since it is smaller than the sum of its proper divisors (127814928).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66981432 is a wasteful number, since it uses less digits than its factorization.
66981432 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 56980 (or 56969 counting only the distinct ones).
The product of its digits is 62208, while the sum is 39.
The square root of 66981432 is about 8184.2184721573. The cubic root of 66981432 is about 406.1172867645.
The spelling of 66981432 in words is "sixty-six million, nine hundred eighty-one thousand, four hundred thirty-two".
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