66838703195 has 32 divisors (see below), whose sum is σ = 88875795456. Its totient is φ = 47845670400.

The previous prime is 66838703189. The next prime is 66838703207. The reversal of 66838703195 is 59130783866.

It is not a de Polignac number, because 66838703195 - 2⁶ = 66838703131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66838703195.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5008622 + ... + 5021948.

It is an arithmetic number, because the mean of its divisors is an integer number (2777368608).

Almost surely, 2^66838703195 is an apocalyptic number.

66838703195 is a deficient number, since it is larger than the sum of its proper divisors (22037092261).

66838703195 is a wasteful number, since it uses less digits than its factorization.

66838703195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14771.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 66838703195 in words is "sixty-six billion, eight hundred thirty-eight million, seven hundred three thousand, one hundred ninety-five".