199772066 has 64 divisors (see below), whose sum is σ = 365637888. Its totient is φ = 80898048.

The previous prime is 199772063. The next prime is 199772087. The reversal of 199772066 is 660277991.

199772066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 199772066.

It is not an unprimeable number, because it can be changed into a prime (199772063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436910 + ... + 437366.

It is an arithmetic number, because the mean of its divisors is an integer number (5713092).

Almost surely, 2^199772066 is an apocalyptic number.

199772066 is a deficient number, since it is larger than the sum of its proper divisors (165865822).

199772066 is a wasteful number, since it uses less digits than its factorization.

199772066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 199772066 is about 14134.0746425084. The cubic root of 199772066 is about 584.5813021726.

The spelling of 199772066 in words is "one hundred ninety-nine million, seven hundred seventy-two thousand, sixty-six".