66754808734128 has 40 divisors (see below), whose sum is σ = 173004423960576. Its totient is φ = 22180054344000.

The previous prime is 66754808734111. The next prime is 66754808734153. The reversal of 66754808734128 is 82143780845766.

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, 2235877648 + ... + 2235907503.

Almost surely, 2^{66754808734128} is an apocalyptic number.

It is an amenable number.

66754808734128 is an abundant number, since it is smaller than the sum of its proper divisors (106249615226448).

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

66754808734128 is a wasteful number, since it uses less digits than its factorization.

66754808734128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471785473 (or 4471785467 counting only the distinct ones).

The product of its (nonzero) digits is 433520640, while the sum is 69.

The spelling of 66754808734128 in words is "sixty-six trillion, seven hundred fifty-four billion, eight hundred eight million, seven hundred thirty-four thousand, one hundred twenty-eight".