664012199 has 2 divisors, whose sum is σ = 664012200. Its totient is φ = 664012198.

The previous prime is 664012127. The next prime is 664012211. The reversal of 664012199 is 991210466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664012199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664012109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332006099 + 332006100.

It is an arithmetic number, because the mean of its divisors is an integer number (332006100).

Almost surely, 2^664012199 is an apocalyptic number.

664012199 is a deficient number, since it is larger than the sum of its proper divisors (1).

664012199 is an equidigital number, since it uses as much as digits as its factorization.

664012199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 664012199 is about 25768.4341588696. The cubic root of 664012199 is about 872.4194769189.

The spelling of 664012199 in words is "six hundred sixty-four million, twelve thousand, one hundred ninety-nine".