198816660 has 192 divisors, whose sum is σ = 713664000. Its totient is φ = 45010944.

The previous prime is 198816647. The next prime is 198816689. The reversal of 198816660 is 66618891.

It is a happy number.

198816660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 563044 + ... + 563396.

It is an arithmetic number, because the mean of its divisors is an integer number (3717000).

Almost surely, 2^198816660 is an apocalyptic number.

198816660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198816660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356832000).

198816660 is an abundant number, since it is smaller than the sum of its proper divisors (514847340).

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

198816660 is a wasteful number, since it uses less digits than its factorization.

198816660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 198816660 is about 14100.2361682349. The cubic root of 198816660 is about 583.6478963728.

The spelling of 198816660 in words is "one hundred ninety-eight million, eight hundred sixteen thousand, six hundred sixty".