Base | Representation |
---|---|
bin | 1111111001000… |
… | …1101100101010 |
3 | 11122102112022020 |
4 | 3332101230222 |
5 | 114031011231 |
6 | 10340405310 |
7 | 1436401320 |
oct | 376215452 |
9 | 148375266 |
10 | 66657066 |
11 | 34698493 |
12 | 1a3a6836 |
13 | 10a6b068 |
14 | 8bd1d10 |
15 | 5cba396 |
hex | 3f91b2a |
66657066 has 32 divisors (see below), whose sum is σ = 152990208. Its totient is φ = 18966000.
The previous prime is 66657053. The next prime is 66657067. The reversal of 66657066 is 66075666.
It is a Harshad number since it is a multiple of its sum of digits (42).
It is not an unprimeable number, because it can be changed into a prime (66657067) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7381 + ... + 13703.
It is an arithmetic number, because the mean of its divisors is an integer number (4780944).
Almost surely, 266657066 is an apocalyptic number.
66657066 is an abundant number, since it is smaller than the sum of its proper divisors (86333142).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66657066 is a wasteful number, since it uses less digits than its factorization.
66657066 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6586.
The product of its (nonzero) digits is 272160, while the sum is 42.
The square root of 66657066 is about 8164.3778697461. The cubic root of 66657066 is about 405.4606677058.
It can be divided in two parts, 6665 and 7066, that added together give a palindrome (13731).
The spelling of 66657066 in words is "sixty-six million, six hundred fifty-seven thousand, sixty-six".
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