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66455 = 513291
BaseRepresentation
bin10000001110010111
310101011022
4100032113
54111310
61231355
7364514
oct201627
9111138
1066455
1145a24
123255b
132432c
141a30b
1514a55
hex10397

66455 has 4 divisors (see below), whose sum is σ = 79752. Its totient is φ = 53160.

The previous prime is 66449. The next prime is 66457. The reversal of 66455 is 55466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55466 = 227733.

It is not a de Polignac number, because 66455 - 216 = 919 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

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 66455.

It is not an unprimeable number, because it can be changed into a prime (66457) 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, 6641 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (19938).

266455 is an apocalyptic number.

66455 is a deficient number, since it is larger than the sum of its proper divisors (13297).

66455 is a wasteful number, since it uses less digits than its factorization.

66455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13296.

The product of its digits is 3600, while the sum is 26.

The square root of 66455 is about 257.7886731414. The cubic root of 66455 is about 40.5050544929.

The spelling of 66455 in words is "sixty-six thousand, four hundred fifty-five".

Divisors: 1 5 13291 66455