660073 has 2 divisors, whose sum is σ = 660074. Its totient is φ = 660072.

The previous prime is 660071. The next prime is 660097. The reversal of 660073 is 370066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659344 + 729 = 812^2 + 27^2 .

It is a cyclic number.

It is not a de Polignac number, because 660073 - 2¹ = 660071 is a prime.

Together with 660071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (660071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330036 + 330037.

It is an arithmetic number, because the mean of its divisors is an integer number (330037).

2⁶⁶⁰⁰⁷³ is an apocalyptic number.

It is an amenable number.

660073 is a deficient number, since it is larger than the sum of its proper divisors (1).

660073 is an equidigital number, since it uses as much as digits as its factorization.

660073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 660073 is about 812.4487676155. The cubic root of 660073 is about 87.0690867979.

The spelling of 660073 in words is "six hundred sixty thousand, seventy-three".