667241 has 2 divisors, whose sum is σ = 667242. Its totient is φ = 667240.

The previous prime is 667229. The next prime is 667243. The reversal of 667241 is 142766.

667241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490000 + 177241 = 700^2 + 421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667241 is a prime.

Together with 667243, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667241.

It is not a weakly prime, because it can be changed into another prime (667243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333620 + 333621.

It is an arithmetic number, because the mean of its divisors is an integer number (333621).

2⁶⁶⁷²⁴¹ is an apocalyptic number.

It is an amenable number.

667241 is a deficient number, since it is larger than the sum of its proper divisors (1).

667241 is an equidigital number, since it uses as much as digits as its factorization.

667241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 667241 is about 816.8482111139. The cubic root of 667241 is about 87.3831255921.

The spelling of 667241 in words is "six hundred sixty-seven thousand, two hundred forty-one".