66963723868 has 12 divisors (see below), whose sum is σ = 117188771112. Its totient is φ = 33481217840.

The previous prime is 66963723847. The next prime is 66963723881. The reversal of 66963723868 is 86832736966.

It is a congruent number.

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, 132246 + ... + 389122.

It is an arithmetic number, because the mean of its divisors is an integer number (9765730926).

Almost surely, 2^66963723868 is an apocalyptic number.

It is an amenable number.

66963723868 is a deficient number, since it is larger than the sum of its proper divisors (50225047244).

66963723868 is a wasteful number, since it uses less digits than its factorization.

66963723868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322052 (or 322050 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 64.

The spelling of 66963723868 in words is "sixty-six billion, nine hundred sixty-three million, seven hundred twenty-three thousand, eight hundred sixty-eight".