Base | Representation |
---|---|
bin | 1111111011011… |
… | …1011010010000 |
3 | 11122201101012100 |
4 | 3332313122100 |
5 | 114100432121 |
6 | 10344000400 |
7 | 1440613551 |
oct | 376673220 |
9 | 148641170 |
10 | 66811536 |
11 | 34793550 |
12 | 1a460100 |
13 | 10ac346c |
14 | 8c32328 |
15 | 5ceb026 |
hex | 3fb7690 |
66811536 has 60 divisors (see below), whose sum is σ = 203982480. Its totient is φ = 20245440.
The previous prime is 66811517. The next prime is 66811567. The reversal of 66811536 is 63511866.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a self number, because there is not a number n which added to its sum of digits gives 66811536.
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, 19506 + ... + 22673.
It is an arithmetic number, because the mean of its divisors is an integer number (3399708).
Almost surely, 266811536 is an apocalyptic number.
66811536 is a gapful number since it is divisible by the number (66) formed by its first and last digit.
It is an amenable number.
66811536 is an abundant number, since it is smaller than the sum of its proper divisors (137170944).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66811536 is a wasteful number, since it uses less digits than its factorization.
66811536 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 42204 (or 42195 counting only the distinct ones).
The product of its digits is 25920, while the sum is 36.
The square root of 66811536 is about 8173.8323936817. The cubic root of 66811536 is about 405.7736287309.
The spelling of 66811536 in words is "sixty-six million, eight hundred eleven thousand, five hundred thirty-six".
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