66398242198 has 8 divisors (see below), whose sum is σ = 99735887520. Its totient is φ = 33152946360.

The previous prime is 66398242151. The next prime is 66398242249. The reversal of 66398242198 is 89124289366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23085573 + ... + 23088448.

It is an arithmetic number, because the mean of its divisors is an integer number (12466985940).

Almost surely, 2^66398242198 is an apocalyptic number.

66398242198 is a deficient number, since it is larger than the sum of its proper divisors (33337645322).

66398242198 is a wasteful number, since it uses less digits than its factorization.

66398242198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46174742.

The product of its digits is 8957952, while the sum is 58.

The spelling of 66398242198 in words is "sixty-six billion, three hundred ninety-eight million, two hundred forty-two thousand, one hundred ninety-eight".