66192863768 has 8 divisors (see below), whose sum is σ = 124111619580. Its totient is φ = 33096431880.

The previous prime is 66192863761. The next prime is 66192863783. The reversal of 66192863768 is 86736829166.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66192863768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66192863761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137053978 + ... + 4137053993.

Almost surely, 2^66192863768 is an apocalyptic number.

It is an amenable number.

66192863768 is a deficient number, since it is larger than the sum of its proper divisors (57918755812).

66192863768 is a wasteful number, since it uses less digits than its factorization.

66192863768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274107977 (or 8274107973 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 62.

The spelling of 66192863768 in words is "sixty-six billion, one hundred ninety-two million, eight hundred sixty-three thousand, seven hundred sixty-eight".