66969782268 has 24 divisors (see below), whose sum is σ = 156424447872. Its totient is φ = 22300171824.

The previous prime is 66969782237. The next prime is 66969782293. The reversal of 66969782268 is 86228796966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2874030 + ... + 2897237.

It is an arithmetic number, because the mean of its divisors is an integer number (6517685328).

Almost surely, 2^66969782268 is an apocalyptic number.

It is an amenable number.

66969782268 is an abundant number, since it is smaller than the sum of its proper divisors (89454665604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66969782268 is a wasteful number, since it uses less digits than its factorization.

66969782268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772241 (or 5772239 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 69.

The spelling of 66969782268 in words is "sixty-six billion, nine hundred sixty-nine million, seven hundred eighty-two thousand, two hundred sixty-eight".