66481571058 has 32 divisors (see below), whose sum is σ = 153378054144. Its totient is φ = 18817212432.

The previous prime is 66481571003. The next prime is 66481571059. The reversal of 66481571058 is 85017518466.

It is a self number, because there is not a number n which added to its sum of digits gives 66481571058.

It is not an unprimeable number, because it can be changed into a prime (66481571059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7392210 + ... + 7401197.

It is an arithmetic number, because the mean of its divisors is an integer number (4793064192).

Almost surely, 2^66481571058 is an apocalyptic number.

66481571058 is an abundant number, since it is smaller than the sum of its proper divisors (86896483086).

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

66481571058 is a wasteful number, since it uses less digits than its factorization.

66481571058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14793526.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 66481571058 in words is "sixty-six billion, four hundred eighty-one million, five hundred seventy-one thousand, fifty-eight".