66078625504208 has 40 divisors (see below), whose sum is σ = 128550125943936. Its totient is φ = 32904673401600.

The previous prime is 66078625504189. The next prime is 66078625504223. The reversal of 66078625504208 is 80240552687066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4700798 + ... + 12419933.

Almost surely, 2^{66078625504208} is an apocalyptic number.

It is an amenable number.

66078625504208 is a deficient number, since it is larger than the sum of its proper divisors (62471500439728).

66078625504208 is a wasteful number, since it uses less digits than its factorization.

66078625504208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17121723 (or 17121717 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 59.

The spelling of 66078625504208 in words is "sixty-six trillion, seventy-eight billion, six hundred twenty-five million, five hundred four thousand, two hundred eight".