866112198 has 32 divisors (see below), whose sum is σ = 1981777920. Its totient is φ = 247199040.

The previous prime is 866112157. The next prime is 866112199. The reversal of 866112198 is 891211668.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866112199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31218 + ... + 52026.

It is an arithmetic number, because the mean of its divisors is an integer number (61930560).

Almost surely, 2^866112198 is an apocalyptic number.

866112198 is an abundant number, since it is smaller than the sum of its proper divisors (1115665722).

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

866112198 is a wasteful number, since it uses less digits than its factorization.

866112198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21812.

The product of its digits is 41472, while the sum is 42.

The square root of 866112198 is about 29429.7841990049. The cubic root of 866112198 is about 953.2161350649.

The spelling of 866112198 in words is "eight hundred sixty-six million, one hundred twelve thousand, one hundred ninety-eight".