667245199 has 2 divisors, whose sum is σ = 667245200. Its totient is φ = 667245198.

The previous prime is 667245191. The next prime is 667245283. The reversal of 667245199 is 991542766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667245199 - 2³ = 667245191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667245191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333622599 + 333622600.

It is an arithmetic number, because the mean of its divisors is an integer number (333622600).

Almost surely, 2^667245199 is an apocalyptic number.

667245199 is a deficient number, since it is larger than the sum of its proper divisors (1).

667245199 is an equidigital number, since it uses as much as digits as its factorization.

667245199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The square root of 667245199 is about 25831.0897756947. The cubic root of 667245199 is about 873.8330889471.

The spelling of 667245199 in words is "six hundred sixty-seven million, two hundred forty-five thousand, one hundred ninety-nine".