66489361584 has 40 divisors (see below), whose sum is σ = 179232195072. Its totient is φ = 21199506240.

The previous prime is 66489361583. The next prime is 66489361591. The reversal of 66489361584 is 48516398466.

66489361584 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66489361583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30111832 + ... + 30114039.

Almost surely, 2^66489361584 is an apocalyptic number.

It is an amenable number.

66489361584 is an abundant number, since it is smaller than the sum of its proper divisors (112742833488).

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

66489361584 is a wasteful number, since it uses less digits than its factorization.

66489361584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60225905 (or 60225899 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 60.

The spelling of 66489361584 in words is "sixty-six billion, four hundred eighty-nine million, three hundred sixty-one thousand, five hundred eighty-four".