199136668 has 12 divisors (see below), whose sum is σ = 363641040. Its totient is φ = 95239232.

The previous prime is 199136647. The next prime is 199136683. The reversal of 199136668 is 866631991.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1082173 + ... + 1082356.

It is an arithmetic number, because the mean of its divisors is an integer number (30303420).

Almost surely, 2^199136668 is an apocalyptic number.

It is an amenable number.

199136668 is a deficient number, since it is larger than the sum of its proper divisors (164504372).

199136668 is a wasteful number, since it uses less digits than its factorization.

199136668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164556 (or 2164554 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The square root of 199136668 is about 14111.5792170827. The cubic root of 199136668 is about 583.9608679290.

The spelling of 199136668 in words is "one hundred ninety-nine million, one hundred thirty-six thousand, six hundred sixty-eight".