66241 has 4 divisors (see below), whose sum is σ = 75712. Its totient is φ = 56772.

The previous prime is 66239. The next prime is 66271. The reversal of 66241 is 14266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66241 - 2¹ = 66239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4725 + ... + 4738.

It is an arithmetic number, because the mean of its divisors is an integer number (18928).

2⁶⁶²⁴¹ is an apocalyptic number.

It is an amenable number.

66241 is a deficient number, since it is larger than the sum of its proper divisors (9471).

66241 is an equidigital number, since it uses as much as digits as its factorization.

66241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470.

The product of its digits is 288, while the sum is 19.

The square root of 66241 is about 257.3732697853. The cubic root of 66241 is about 40.4615292867.

It can be divided in two parts, 662 and 41, that added together give a triangular number (703 = T₃₇).

The spelling of 66241 in words is "sixty-six thousand, two hundred forty-one".