199613666 has 16 divisors (see below), whose sum is σ = 350542080. Its totient is φ = 83461920.

The previous prime is 199613651. The next prime is 199613669. The reversal of 199613666 is 666316991.

It is a self number, because there is not a number n which added to its sum of digits gives 199613666.

It is not an unprimeable number, because it can be changed into a prime (199613669) 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 in 7 ways as a sum of consecutive naturals, for example, 173306 + ... + 174453.

It is an arithmetic number, because the mean of its divisors is an integer number (21908880).

Almost surely, 2^199613666 is an apocalyptic number.

199613666 is a deficient number, since it is larger than the sum of its proper divisors (150928414).

199613666 is a wasteful number, since it uses less digits than its factorization.

199613666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347809.

The product of its digits is 314928, while the sum is 47.

The square root of 199613666 is about 14128.4700516369. The cubic root of 199613666 is about 584.4267557695.

The spelling of 199613666 in words is "one hundred ninety-nine million, six hundred thirteen thousand, six hundred sixty-six".