66355198 has 32 divisors (see below), whose sum is σ = 122927616. Its totient is φ = 26159328.

The previous prime is 66355193. The next prime is 66355217. The reversal of 66355198 is 89155366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66355193) 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, 80215 + ... + 81037.

It is an arithmetic number, because the mean of its divisors is an integer number (3841488).

Almost surely, 2^66355198 is an apocalyptic number.

66355198 is a deficient number, since it is larger than the sum of its proper divisors (56572418).

66355198 is a wasteful number, since it uses less digits than its factorization.

66355198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288.

The product of its digits is 194400, while the sum is 43.

The square root of 66355198 is about 8145.8699965074. The cubic root of 66355198 is about 404.8476752774.

The spelling of 66355198 in words is "sixty-six million, three hundred fifty-five thousand, one hundred ninety-eight".