66604458798 has 24 divisors (see below), whose sum is σ = 144334712808. Its totient is φ = 22197632112.

The previous prime is 66604458779. The next prime is 66604458841. The reversal of 66604458798 is 89785440666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213640 + ... + 422907.

It is an arithmetic number, because the mean of its divisors is an integer number (6013946367).

Almost surely, 2^66604458798 is an apocalyptic number.

66604458798 is an abundant number, since it is smaller than the sum of its proper divisors (77730254010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66604458798 is a wasteful number, since it uses less digits than its factorization.

66604458798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642368 (or 642365 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 66604458798 in words is "sixty-six billion, six hundred four million, four hundred fifty-eight thousand, seven hundred ninety-eight".