666984549524 has 12 divisors (see below), whose sum is σ = 1181285889504. Its totient is φ = 329474295384.

The previous prime is 666984549509. The next prime is 666984549527. The reversal of 666984549524 is 425945489666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666984549527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004494472 + ... + 1004495135.

It is an arithmetic number, because the mean of its divisors is an integer number (98440490792).

Almost surely, 2^666984549524 is an apocalyptic number.

It is an amenable number.

666984549524 is a deficient number, since it is larger than the sum of its proper divisors (514301339980).

666984549524 is a wasteful number, since it uses less digits than its factorization.

666984549524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008989694 (or 2008989692 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 68.

The spelling of 666984549524 in words is "six hundred sixty-six billion, nine hundred eighty-four million, five hundred forty-nine thousand, five hundred twenty-four".