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66287 = 135099
BaseRepresentation
bin10000001011101111
310100221002
4100023233
54110122
61230515
7364154
oct201357
9110832
1066287
1145891
123243b
1324230
141a22b
1514992
hex102ef

66287 has 4 divisors (see below), whose sum is σ = 71400. Its totient is φ = 61176.

The previous prime is 66271. The next prime is 66293. The reversal of 66287 is 78266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78266 = 239133.

It is a cyclic number.

It is not a de Polignac number, because 66287 - 24 = 66271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 66287.

It is not an unprimeable number, because it can be changed into a prime (66587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2537 + ... + 2562.

It is an arithmetic number, because the mean of its divisors is an integer number (17850).

266287 is an apocalyptic number.

66287 is a deficient number, since it is larger than the sum of its proper divisors (5113).

66287 is a wasteful number, since it uses less digits than its factorization.

66287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112.

The product of its digits is 4032, while the sum is 29.

The square root of 66287 is about 257.4626186459. The cubic root of 66287 is about 40.4708930729.

It can be divided in two parts, 66 and 287, that added together give a palindrome (353).

The spelling of 66287 in words is "sixty-six thousand, two hundred eighty-seven".

Divisors: 1 13 5099 66287