66502716288 has 32 divisors (see below), whose sum is σ = 176647841160. Its totient is φ = 22167571968.

The previous prime is 66502716283. The next prime is 66502716299. The reversal of 66502716288 is 88261720566.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×66502716288³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66502716288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66502716283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86591695 + ... + 86592462.

Almost surely, 2^66502716288 is an apocalyptic number.

It is an amenable number.

66502716288 is an abundant number, since it is smaller than the sum of its proper divisors (110145124872).

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

66502716288 is a wasteful number, since it uses less digits than its factorization.

66502716288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173184174 (or 173184162 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 66502716288 in words is "sixty-six billion, five hundred two million, seven hundred sixteen thousand, two hundred eighty-eight".