66447134236 has 18 divisors (see below), whose sum is σ = 135267380808. Its totient is φ = 28477343160.

The previous prime is 66447134209. The next prime is 66447134321. The reversal of 66447134236 is 63243174466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169507800 + ... + 169508191.

Almost surely, 2^66447134236 is an apocalyptic number.

It is an amenable number.

66447134236 is an abundant number, since it is smaller than the sum of its proper divisors (68820246572).

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

66447134236 is a wasteful number, since it uses less digits than its factorization.

66447134236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339016009 (or 339016000 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 46.

The spelling of 66447134236 in words is "sixty-six billion, four hundred forty-seven million, one hundred thirty-four thousand, two hundred thirty-six".