Base | Representation |
---|---|
bin | 10011111000100… |
… | …10101010111101 |
3 | 102121212022200001 |
4 | 21330102222331 |
5 | 320200100221 |
6 | 24315034301 |
7 | 4063530361 |
oct | 1174225275 |
9 | 377768601 |
10 | 166800061 |
11 | 8617739a |
12 | 47a3b991 |
13 | 2873197c |
14 | 1821d2a1 |
15 | e99c391 |
hex | 9f12abd |
166800061 has 2 divisors, whose sum is σ = 166800062. Its totient is φ = 166800060.
The previous prime is 166800059. The next prime is 166800079. The reversal of 166800061 is 160008661.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 166564836 + 235225 = 12906^2 + 485^2 .
It is an emirp because it is prime and its reverse (160008661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 190008991 and 199800091.
It is a cyclic number.
It is not a de Polignac number, because 166800061 - 21 = 166800059 is a prime.
Together with 166800059, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (166800001) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83400030 + 83400031.
It is an arithmetic number, because the mean of its divisors is an integer number (83400031).
Almost surely, 2166800061 is an apocalyptic number.
It is an amenable number.
166800061 is a deficient number, since it is larger than the sum of its proper divisors (1).
166800061 is an equidigital number, since it uses as much as digits as its factorization.
166800061 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1728, while the sum is 28.
The square root of 166800061 is about 12915.1097943455. The cubic root of 166800061 is about 550.4679884581.
The spelling of 166800061 in words is "one hundred sixty-six million, eight hundred thousand, sixty-one".
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