66195316195 has 4 divisors (see below), whose sum is σ = 79434379440. Its totient is φ = 52956252952.

The previous prime is 66195316181. The next prime is 66195316207. The reversal of 66195316195 is 59161359166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66195316195 - 2⁷ = 66195316067 is a prime.

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, 6619531615 + ... + 6619531624.

It is an arithmetic number, because the mean of its divisors is an integer number (19858594860).

Almost surely, 2^66195316195 is an apocalyptic number.

66195316195 is a deficient number, since it is larger than the sum of its proper divisors (13239063245).

66195316195 is a wasteful number, since it uses less digits than its factorization.

66195316195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13239063244.

The product of its digits is 1312200, while the sum is 52.

The spelling of 66195316195 in words is "sixty-six billion, one hundred ninety-five million, three hundred sixteen thousand, one hundred ninety-five".