66108198 has 32 divisors (see below), whose sum is σ = 143136000. Its totient is φ = 20234016.

The previous prime is 66108191. The next prime is 66108209. The reversal of 66108198 is 89180166.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66108191) 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, 13393 + ... + 17651.

It is an arithmetic number, because the mean of its divisors is an integer number (4473000).

Almost surely, 2^66108198 is an apocalyptic number.

66108198 is an abundant number, since it is smaller than the sum of its proper divisors (77027802).

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

66108198 is a wasteful number, since it uses less digits than its factorization.

66108198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 66108198 is about 8130.6948042587. The cubic root of 66108198 is about 404.3447168934.

The spelling of 66108198 in words is "sixty-six million, one hundred eight thousand, one hundred ninety-eight".