66766455212 has 12 divisors (see below), whose sum is σ = 117998141856. Its totient is φ = 33052700400.

The previous prime is 66766455199. The next prime is 66766455227. The reversal of 66766455212 is 21255466766.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 82631348 + ... + 82632155.

It is an arithmetic number, because the mean of its divisors is an integer number (9833178488).

Almost surely, 2^66766455212 is an apocalyptic number.

It is an amenable number.

66766455212 is a deficient number, since it is larger than the sum of its proper divisors (51231686644).

66766455212 is a wasteful number, since it uses less digits than its factorization.

66766455212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165263608 (or 165263606 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 66766455212 in words is "sixty-six billion, seven hundred sixty-six million, four hundred fifty-five thousand, two hundred twelve".