66507352772 has 48 divisors (see below), whose sum is σ = 141254682240. Its totient is φ = 26763996672.

The previous prime is 66507352733. The next prime is 66507352817. The reversal of 66507352772 is 27725370566.

It is a self number, because there is not a number n which added to its sum of digits gives 66507352772.

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, 493043 + ... + 613274.

It is an arithmetic number, because the mean of its divisors is an integer number (2942805880).

Almost surely, 2^66507352772 is an apocalyptic number.

It is an amenable number.

66507352772 is an abundant number, since it is smaller than the sum of its proper divisors (74747329468).

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

66507352772 is a wasteful number, since it uses less digits than its factorization.

66507352772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106460 (or 1106458 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 50.

The spelling of 66507352772 in words is "sixty-six billion, five hundred seven million, three hundred fifty-two thousand, seven hundred seventy-two".