66608942288 has 80 divisors (see below), whose sum is σ = 150654214656. Its totient is φ = 27937228800.

The previous prime is 66608942263. The next prime is 66608942293. The reversal of 66608942288 is 88224980666.

It is a super-2 number, since 2×66608942288² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2366345 + ... + 2394327.

Almost surely, 2^66608942288 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 66608942288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75327107328).

66608942288 is an abundant number, since it is smaller than the sum of its proper divisors (84045272368).

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

66608942288 is a wasteful number, since it uses less digits than its factorization.

66608942288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28452 (or 28446 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 59.

The spelling of 66608942288 in words is "sixty-six billion, six hundred eight million, nine hundred forty-two thousand, two hundred eighty-eight".