660199 has 2 divisors, whose sum is σ = 660200. Its totient is φ = 660198.

The previous prime is 660197. The next prime is 660217. The reversal of 660199 is 991066.

660199 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 is a cyclic number.

It is not a de Polignac number, because 660199 - 2¹ = 660197 is a prime.

Together with 660197, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 660199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330099 + 330100.

It is an arithmetic number, because the mean of its divisors is an integer number (330100).

2⁶⁶⁰¹⁹⁹ is an apocalyptic number.

660199 is a deficient number, since it is larger than the sum of its proper divisors (1).

660199 is an equidigital number, since it uses as much as digits as its factorization.

660199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 660199 is about 812.5263072664. The cubic root of 660199 is about 87.0746265928.

The spelling of 660199 in words is "six hundred sixty thousand, one hundred ninety-nine".