66355 has 8 divisors (see below), whose sum is σ = 83232. Its totient is φ = 50688.

The previous prime is 66347. The next prime is 66359. The reversal of 66355 is 55366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66355 - 2³ = 66347 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6 + 6⁶ + 3⁹ + 5 + 5 .

It is a Duffinian number.

66355 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (66359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 403.

It is an arithmetic number, because the mean of its divisors is an integer number (10404).

2⁶⁶³⁵⁵ is an apocalyptic number.

66355 is a deficient number, since it is larger than the sum of its proper divisors (16877).

66355 is a wasteful number, since it uses less digits than its factorization.

66355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605.

The product of its digits is 2700, while the sum is 25.

The square root of 66355 is about 257.5946428014. The cubic root of 66355 is about 40.4847272596.

The spelling of 66355 in words is "sixty-six thousand, three hundred fifty-five".