1668344199 has 16 divisors (see below), whose sum is σ = 2258872320. Its totient is φ = 1095101280.

The previous prime is 1668344189. The next prime is 1668344201. The reversal of 1668344199 is 9914438661.

1668344199 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1668344199 - 2⁹ = 1668343687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668344189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77389 + ... + 96569.

It is an arithmetic number, because the mean of its divisors is an integer number (141179520).

Almost surely, 2^1668344199 is an apocalyptic number.

1668344199 is a deficient number, since it is larger than the sum of its proper divisors (590528121).

1668344199 is a wasteful number, since it uses less digits than its factorization.

1668344199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19630.

The product of its digits is 1119744, while the sum is 51.

The square root of 1668344199 is about 40845.3693703460. The cubic root of 1668344199 is about 1186.0287550128.

The spelling of 1668344199 in words is "one billion, six hundred sixty-eight million, three hundred forty-four thousand, one hundred ninety-nine".