664199 has 2 divisors, whose sum is σ = 664200. Its totient is φ = 664198.

The previous prime is 664193. The next prime is 664211. The reversal of 664199 is 991466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664199 - 2¹² = 660103 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664199.

It is not a weakly prime, because it can be changed into another prime (664193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332099 + 332100.

It is an arithmetic number, because the mean of its divisors is an integer number (332100).

2⁶⁶⁴¹⁹⁹ is an apocalyptic number.

664199 is a deficient number, since it is larger than the sum of its proper divisors (1).

664199 is an equidigital number, since it uses as much as digits as its factorization.

664199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 664199 is about 814.9840489237. The cubic root of 664199 is about 87.2501279407.

The spelling of 664199 in words is "six hundred sixty-four thousand, one hundred ninety-nine".