66805444948 has 12 divisors (see below), whose sum is σ = 127537667712. Its totient is φ = 30366111320.

The previous prime is 66805444933. The next prime is 66805444961. The reversal of 66805444948 is 84944450866.

It is a junction number, because it is equal to n+sod(n) for n = 66805444892 and 66805444901.

It is a congruent number.

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, 759152740 + ... + 759152827.

It is an arithmetic number, because the mean of its divisors is an integer number (10628138976).

Almost surely, 2^66805444948 is an apocalyptic number.

It is an amenable number.

66805444948 is a deficient number, since it is larger than the sum of its proper divisors (60732222764).

66805444948 is a wasteful number, since it uses less digits than its factorization.

66805444948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518305582 (or 1518305580 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 58.

The spelling of 66805444948 in words is "sixty-six billion, eight hundred five million, four hundred forty-four thousand, nine hundred forty-eight".