66195218 has 8 divisors (see below), whose sum is σ = 99327600. Its totient is φ = 33086020.

The previous prime is 66195203. The next prime is 66195277. The reversal of 66195218 is 81259166.

66195218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6953 + ... + 13443.

It is an arithmetic number, because the mean of its divisors is an integer number (12415950).

Almost surely, 2^66195218 is an apocalyptic number.

66195218 is a deficient number, since it is larger than the sum of its proper divisors (33132382).

66195218 is a wasteful number, since it uses less digits than its factorization.

66195218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11592.

The product of its digits is 25920, while the sum is 38.

The square root of 66195218 is about 8136.0443705771. The cubic root of 66195218 is about 404.5220557147.

The spelling of 66195218 in words is "sixty-six million, one hundred ninety-five thousand, two hundred eighteen".