199642366 has 48 divisors (see below), whose sum is σ = 389379312. Its totient is φ = 75868800.

The previous prime is 199642363. The next prime is 199642423. The reversal of 199642366 is 663246991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199642363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41940 + ... + 46456.

It is an arithmetic number, because the mean of its divisors is an integer number (8112069).

Almost surely, 2^199642366 is an apocalyptic number.

199642366 is a deficient number, since it is larger than the sum of its proper divisors (189736946).

199642366 is a wasteful number, since it uses less digits than its factorization.

199642366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585 (or 4578 counting only the distinct ones).

The product of its digits is 419904, while the sum is 46.

The square root of 199642366 is about 14129.4856948156. The cubic root of 199642366 is about 584.4547636116.

The spelling of 199642366 in words is "one hundred ninety-nine million, six hundred forty-two thousand, three hundred sixty-six".