199959660 has 36 divisors (see below), whose sum is σ = 606544848. Its totient is φ = 53322528.

The previous prime is 199959653. The next prime is 199959707. The reversal of 199959660 is 66959991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 199959597 and 199959606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555264 + ... + 555623.

It is an arithmetic number, because the mean of its divisors is an integer number (16848468).

Almost surely, 2^199959660 is an apocalyptic number.

199959660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199959660 is an abundant number, since it is smaller than the sum of its proper divisors (406585188).

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

199959660 is a wasteful number, since it uses less digits than its factorization.

199959660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110902 (or 1110897 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 199959660 is about 14140.7093174282. The cubic root of 199959660 is about 584.7642267069.

The spelling of 199959660 in words is "one hundred ninety-nine million, nine hundred fifty-nine thousand, six hundred sixty".