668241 has 12 divisors (see below), whose sum is σ = 1103232. Its totient is φ = 381816.

The previous prime is 668221. The next prime is 668243. The reversal of 668241 is 142866.

It is not a de Polignac number, because 668241 - 2⁵ = 668209 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (668243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5241 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (91936).

2⁶⁶⁸²⁴¹ is an apocalyptic number.

It is an amenable number.

668241 is a deficient number, since it is larger than the sum of its proper divisors (434991).

668241 is a wasteful number, since it uses less digits than its factorization.

668241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10620 (or 10617 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 668241 is about 817.4600907690. The cubic root of 668241 is about 87.4267577570.

It can be divided in two parts, 668 and 241, that added together give a palindrome (909).

The spelling of 668241 in words is "six hundred sixty-eight thousand, two hundred forty-one".