66350540832 has 144 divisors (see below), whose sum is σ = 184366082880. Its totient is φ = 20890520064.

The previous prime is 66350540831. The next prime is 66350540843. The reversal of 66350540832 is 23804505366.

It is not an unprimeable number, because it can be changed into a prime (66350540831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12438838 + ... + 12444170.

It is an arithmetic number, because the mean of its divisors is an integer number (1280320020).

Almost surely, 2^66350540832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66350540832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92183041440).

66350540832 is an abundant number, since it is smaller than the sum of its proper divisors (118015542048).

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

66350540832 is a wasteful number, since it uses less digits than its factorization.

66350540832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743 (or 5716 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 66350540832 in words is "sixty-six billion, three hundred fifty million, five hundred forty thousand, eight hundred thirty-two".