66530206178328 has 64 divisors (see below), whose sum is σ = 174977164224000. Its totient is φ = 21049104766592.

The previous prime is 66530206178291. The next prime is 66530206178369. The reversal of 66530206178328 is 82387160203566.

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, 810038400 + ... + 810120527.

It is an arithmetic number, because the mean of its divisors is an integer number (2734018191000).

Almost surely, 2^{66530206178328} is an apocalyptic number.

It is an amenable number.

66530206178328 is an abundant number, since it is smaller than the sum of its proper divisors (108446958045672).

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

66530206178328 is a wasteful number, since it uses less digits than its factorization.

66530206178328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620159024 (or 1620159020 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 66530206178328 in words is "sixty-six trillion, five hundred thirty billion, two hundred six million, one hundred seventy-eight thousand, three hundred twenty-eight".