66785332448 has 48 divisors (see below), whose sum is σ = 132792660000. Its totient is φ = 33060690432.

The previous prime is 66785332441. The next prime is 66785332457. The reversal of 66785332448 is 84423358766.

It is a junction number, because it is equal to n+sod(n) for n = 66785332393 and 66785332402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66785332441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4977653 + ... + 4991051.

It is an arithmetic number, because the mean of its divisors is an integer number (2766513750).

Almost surely, 2^66785332448 is an apocalyptic number.

It is an amenable number.

66785332448 is a deficient number, since it is larger than the sum of its proper divisors (66007327552).

66785332448 is a wasteful number, since it uses less digits than its factorization.

66785332448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14947 (or 14939 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 56.

The spelling of 66785332448 in words is "sixty-six billion, seven hundred eighty-five million, three hundred thirty-two thousand, four hundred forty-eight".