66388303028 has 48 divisors (see below), whose sum is σ = 123036083520. Its totient is φ = 31256907264.

The previous prime is 66388303001. The next prime is 66388303043. The reversal of 66388303028 is 82030388366.

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 15 ways as a sum of consecutive naturals, for example, 9111875 + ... + 9119157.

It is an arithmetic number, because the mean of its divisors is an integer number (2563251740).

Almost surely, 2^66388303028 is an apocalyptic number.

It is an amenable number.

66388303028 is a deficient number, since it is larger than the sum of its proper divisors (56647780492).

66388303028 is a wasteful number, since it uses less digits than its factorization.

66388303028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016 (or 8014 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 66388303028 in words is "sixty-six billion, three hundred eighty-eight million, three hundred three thousand, twenty-eight".