199164666 has 16 divisors (see below), whose sum is σ = 398574144. Its totient is φ = 66347424.

The previous prime is 199164653. The next prime is 199164683. The reversal of 199164666 is 666461991.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 1390 + ... + 20006.

It is an arithmetic number, because the mean of its divisors is an integer number (24910884).

Almost surely, 2^199164666 is an apocalyptic number.

199164666 is an abundant number, since it is smaller than the sum of its proper divisors (199409478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199164666 is a wasteful number, since it uses less digits than its factorization.

199164666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20405.

The product of its digits is 419904, while the sum is 48.

The square root of 199164666 is about 14112.5712044262. The cubic root of 199164666 is about 583.9882343442.

The spelling of 199164666 in words is "one hundred ninety-nine million, one hundred sixty-four thousand, six hundred sixty-six".