666073 has 2 divisors, whose sum is σ = 666074. Its totient is φ = 666072.

The previous prime is 666067. The next prime is 666079. The reversal of 666073 is 370666.

666073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (666067) and next prime (666079).

It can be written as a sum of positive squares in only one way, i.e., 627264 + 38809 = 792^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 666073 - 2⁵ = 666041 is a prime.

It is not a weakly prime, because it can be changed into another prime (666079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333036 + 333037.

It is an arithmetic number, because the mean of its divisors is an integer number (333037).

2⁶⁶⁶⁰⁷³ is an apocalyptic number.

It is an amenable number.

666073 is a deficient number, since it is larger than the sum of its proper divisors (1).

666073 is an equidigital number, since it uses as much as digits as its factorization.

666073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 666073 is about 816.1329548548. The cubic root of 666073 is about 87.3321079926.

The spelling of 666073 in words is "six hundred sixty-six thousand, seventy-three".