66558285508 has 48 divisors (see below), whose sum is σ = 141254346240. Its totient is φ = 27025689600.

The previous prime is 66558285467. The next prime is 66558285517. The reversal of 66558285508 is 80558285566.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1859053 + ... + 1894516.

It is an arithmetic number, because the mean of its divisors is an integer number (2942798880).

Almost surely, 2^66558285508 is an apocalyptic number.

It is an amenable number.

66558285508 is an abundant number, since it is smaller than the sum of its proper divisors (74696060732).

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

66558285508 is a wasteful number, since it uses less digits than its factorization.

66558285508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753628 (or 3753626 counting only the distinct ones).

The product of its (nonzero) digits is 23040000, while the sum is 58.

Adding to 66558285508 its sum of digits (58), we get a palindrome (66558285566).

The spelling of 66558285508 in words is "sixty-six billion, five hundred fifty-eight million, two hundred eighty-five thousand, five hundred eight".