66065704180 has 24 divisors (see below), whose sum is σ = 158557690368. Its totient is φ = 22651098528.

The previous prime is 66065704171. The next prime is 66065704189. The reversal of 66065704180 is 8140756066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66065704171) and next prime (66065704189).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66065704189) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 235948804 + ... + 235949083.

It is an arithmetic number, because the mean of its divisors is an integer number (6606570432).

Almost surely, 2^66065704180 is an apocalyptic number.

It is an amenable number.

66065704180 is an abundant number, since it is smaller than the sum of its proper divisors (92491986188).

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

66065704180 is a wasteful number, since it uses less digits than its factorization.

66065704180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471897903 (or 471897901 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 66065704180 in words is "sixty-six billion, sixty-five million, seven hundred four thousand, one hundred eighty".