198112566 has 16 divisors (see below), whose sum is σ = 401241600. Its totient is φ = 65201448.

The previous prime is 198112561. The next prime is 198112571. The reversal of 198112566 is 665211891.

It is an interprime number because it is at equal distance from previous prime (198112561) and next prime (198112571).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198112561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208506 + ... + 209453.

It is an arithmetic number, because the mean of its divisors is an integer number (25077600).

Almost surely, 2^198112566 is an apocalyptic number.

198112566 is an abundant number, since it is smaller than the sum of its proper divisors (203129034).

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

198112566 is a wasteful number, since it uses less digits than its factorization.

198112566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418043.

The product of its digits is 25920, while the sum is 39.

The square root of 198112566 is about 14075.2465697763. The cubic root of 198112566 is about 582.9580999773.

The spelling of 198112566 in words is "one hundred ninety-eight million, one hundred twelve thousand, five hundred sixty-six".