666041 has 2 divisors, whose sum is σ = 666042. Its totient is φ = 666040.

The previous prime is 666031. The next prime is 666067. The reversal of 666041 is 140666.

666041 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., 395641 + 270400 = 629^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 666041 - 2¹⁰ = 665017 is a prime.

It is a super-2 number, since 2×666041² = 887221227362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665998 and 666016.

It is not a weakly prime, because it can be changed into another prime (666031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333020 + 333021.

It is an arithmetic number, because the mean of its divisors is an integer number (333021).

2⁶⁶⁶⁰⁴¹ is an apocalyptic number.

It is an amenable number.

666041 is a deficient number, since it is larger than the sum of its proper divisors (1).

666041 is an equidigital number, since it uses as much as digits as its factorization.

666041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 666041 is about 816.1133499705. The cubic root of 666041 is about 87.3307094110.

The spelling of 666041 in words is "six hundred sixty-six thousand, forty-one".