66942464817208 has 8 divisors (see below), whose sum is σ = 125517121532280. Its totient is φ = 33471232408600.

The previous prime is 66942464817121. The next prime is 66942464817257. The reversal of 66942464817208 is 80271846424966.

66942464817208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4183904051068 + ... + 4183904051083.

It is an arithmetic number, because the mean of its divisors is an integer number (15689640191535).

Almost surely, 2^{66942464817208} is an apocalyptic number.

It is an amenable number.

66942464817208 is a deficient number, since it is larger than the sum of its proper divisors (58574656715072).

66942464817208 is a wasteful number, since it uses less digits than its factorization.

66942464817208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8367808102157 (or 8367808102153 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 67.

The spelling of 66942464817208 in words is "sixty-six trillion, nine hundred forty-two billion, four hundred sixty-four million, eight hundred seventeen thousand, two hundred eight".