66558835485 has 64 divisors (see below), whose sum is σ = 122886466560. Its totient is φ = 34154809920.

The previous prime is 66558835481. The next prime is 66558835507. The reversal of 66558835485 is 58453885566.

66558835485 is a `hidden beast` number, since 6 + 6 + 5 + 5 + 8 + 83 + 548 + 5 = 666.

It is not a de Polignac number, because 66558835485 - 2² = 66558835481 is a prime.

It is a super-2 number, since 2×66558835485² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66558835481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 303370 + ... + 474500.

It is an arithmetic number, because the mean of its divisors is an integer number (1920101040).

Almost surely, 2^66558835485 is an apocalyptic number.

It is an amenable number.

66558835485 is a deficient number, since it is larger than the sum of its proper divisors (56327631075).

66558835485 is a wasteful number, since it uses less digits than its factorization.

66558835485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171255 (or 171249 counting only the distinct ones).

The product of its digits is 138240000, while the sum is 63.

The spelling of 66558835485 in words is "sixty-six billion, five hundred fifty-eight million, eight hundred thirty-five thousand, four hundred eighty-five".