667441 has 2 divisors, whose sum is σ = 667442. Its totient is φ = 667440.

The previous prime is 667427. The next prime is 667463. The reversal of 667441 is 144766.

667441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 21025 = 804^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 667441 - 2⁹ = 666929 is a prime.

It is not a weakly prime, because it can be changed into another prime (667421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333720 + 333721.

It is an arithmetic number, because the mean of its divisors is an integer number (333721).

2⁶⁶⁷⁴⁴¹ is an apocalyptic number.

It is an amenable number.

667441 is a deficient number, since it is larger than the sum of its proper divisors (1).

667441 is an equidigital number, since it uses as much as digits as its factorization.

667441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 667441 is about 816.9706237069. The cubic root of 667441 is about 87.3918555109.

The spelling of 667441 in words is "six hundred sixty-seven thousand, four hundred forty-one".