Base | Representation |
---|---|
bin | 1111111100101… |
… | …0010011000011 |
3 | 11122212022022122 |
4 | 3333022103003 |
5 | 114110421044 |
6 | 10345354455 |
7 | 1441355240 |
oct | 377122303 |
9 | 148768278 |
10 | 66888899 |
11 | 34836690 |
12 | 1a498a2b |
13 | 10b1c73c |
14 | 8c525c7 |
15 | 5d13dee |
hex | 3fca4c3 |
66888899 has 32 divisors (see below), whose sum is σ = 87920640. Its totient is φ = 49341600.
The previous prime is 66888889. The next prime is 66888907. The reversal of 66888899 is 99888866.
It is a happy number.
It is not a de Polignac number, because 66888899 - 24 = 66888883 is a prime.
66888899 is a strobogrammatic number because it is the same when read upside-down.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a zygodrome in base 10.
It is not an unprimeable number, because it can be changed into a prime (66888869) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316904 + ... + 317114.
It is an arithmetic number, because the mean of its divisors is an integer number (2747520).
Almost surely, 266888899 is an apocalyptic number.
66888899 is a deficient number, since it is larger than the sum of its proper divisors (21031741).
66888899 is a wasteful number, since it uses less digits than its factorization.
66888899 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 431.
The product of its digits is 11943936, while the sum is 62.
The square root of 66888899 is about 8178.5633824040. The cubic root of 66888899 is about 405.9301873054.
The spelling of 66888899 in words is "sixty-six million, eight hundred eighty-eight thousand, eight hundred ninety-nine".
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