198995766 has 8 divisors (see below), whose sum is σ = 397991544. Its totient is φ = 66331920.

The previous prime is 198995743. The next prime is 198995809. The reversal of 198995766 is 667599891.

It is a sphenic number, since it is the product of 3 distinct primes.

198995766 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16582975 + ... + 16582986.

It is an arithmetic number, because the mean of its divisors is an integer number (49748943).

Almost surely, 2^198995766 is an apocalyptic number.

198995766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

198995766 is a wasteful number, since it uses less digits than its factorization.

198995766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33165966.

The product of its digits is 7348320, while the sum is 60.

The square root of 198995766 is about 14106.5859087165. The cubic root of 198995766 is about 583.8231054749.

The spelling of 198995766 in words is "one hundred ninety-eight million, nine hundred ninety-five thousand, seven hundred sixty-six".