66447050508 has 72 divisors (see below), whose sum is σ = 175314048000. Its totient is φ = 21180224736.

The previous prime is 66447050503. The next prime is 66447050519. The reversal of 66447050508 is 80505074466.

66447050508 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 (66447050503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3832443 + ... + 3849741.

Almost surely, 2^66447050508 is an apocalyptic number.

It is an amenable number.

66447050508 is an abundant number, since it is smaller than the sum of its proper divisors (108866997492).

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

66447050508 is a wasteful number, since it uses less digits than its factorization.

66447050508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21971 (or 21966 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 66447050508 in words is "sixty-six billion, four hundred forty-seven million, fifty thousand, five hundred eight".