199000066 has 4 divisors (see below), whose sum is σ = 298500102. Its totient is φ = 99500032.

The previous prime is 199000057. The next prime is 199000073. The reversal of 199000066 is 660000991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 157126225 + 41873841 = 12535^2 + 6471^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49750015 + ... + 49750018.

Almost surely, 2^199000066 is an apocalyptic number.

199000066 is a deficient number, since it is larger than the sum of its proper divisors (99500036).

199000066 is an equidigital number, since it uses as much as digits as its factorization.

199000066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99500035.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 199000066 is about 14106.7383189737. The cubic root of 199000066 is about 583.8273106251.

The spelling of 199000066 in words is "one hundred ninety-nine million, sixty-six", and thus it is an aban number.