660599 has 2 divisors, whose sum is σ = 660600. Its totient is φ = 660598.

The previous prime is 660593. The next prime is 660601. The reversal of 660599 is 995066.

660599 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660599 is a prime.

Together with 660601, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330299 + 330300.

It is an arithmetic number, because the mean of its divisors is an integer number (330300).

2⁶⁶⁰⁵⁹⁹ is an apocalyptic number.

660599 is a deficient number, since it is larger than the sum of its proper divisors (1).

660599 is an equidigital number, since it uses as much as digits as its factorization.

660599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 660599 is about 812.7724158705. The cubic root of 660599 is about 87.0922085737.

The spelling of 660599 in words is "six hundred sixty thousand, five hundred ninety-nine".