66255 has 16 divisors (see below), whose sum is σ = 121344. Its totient is φ = 30240.

The previous prime is 66239. The next prime is 66271. The reversal of 66255 is 55266.

It is an interprime number because it is at equal distance from previous prime (66239) and next prime (66271).

It is not a de Polignac number, because 66255 - 2⁴ = 66239 is a prime.

It is an Ulam number.

66255 is a lucky 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 66255.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211 + ... + 420.

It is an arithmetic number, because the mean of its divisors is an integer number (7584).

2⁶⁶²⁵⁵ is an apocalyptic number.

66255 is a deficient number, since it is larger than the sum of its proper divisors (55089).

66255 is a wasteful number, since it uses less digits than its factorization.

66255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646.

The product of its digits is 1800, while the sum is 24.

The square root of 66255 is about 257.4004662000. The cubic root of 66255 is about 40.4643795934.

It can be divided in two parts, 662 and 55, that added together give a palindrome (717).

The spelling of 66255 in words is "sixty-six thousand, two hundred fifty-five".