198995166 has 48 divisors (see below), whose sum is σ = 457838784. Its totient is φ = 62249472.

The previous prime is 198995161. The next prime is 198995177. The reversal of 198995166 is 661599891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198995161) 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, 139131 + ... + 140553.

It is an arithmetic number, because the mean of its divisors is an integer number (9538308).

Almost surely, 2^198995166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198995166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228919392).

198995166 is an abundant number, since it is smaller than the sum of its proper divisors (258843618).

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

198995166 is a wasteful number, since it uses less digits than its factorization.

198995166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1902 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 198995166 is about 14106.5646420381. The cubic root of 198995166 is about 583.8225187049.

The spelling of 198995166 in words is "one hundred ninety-eight million, nine hundred ninety-five thousand, one hundred sixty-six".