66044610520518 has 128 divisors (see below), whose sum is σ = 151766286336000. Its totient is φ = 18769333807872.

The previous prime is 66044610520423. The next prime is 66044610520519. The reversal of 66044610520518 is 81502501644066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66044610520519) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10445135305 + ... + 10445141627.

It is an arithmetic number, because the mean of its divisors is an integer number (1185674112000).

Almost surely, 2^{66044610520518} is an apocalyptic number.

66044610520518 is an abundant number, since it is smaller than the sum of its proper divisors (85721675815482).

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

66044610520518 is a wasteful number, since it uses less digits than its factorization.

66044610520518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8386.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 66044610520518 in words is "sixty-six trillion, forty-four billion, six hundred ten million, five hundred twenty thousand, five hundred eighteen".