66356544336 has 40 divisors (see below), whose sum is σ = 173835463104. Its totient is φ = 21807313920.

The previous prime is 66356544311. The next prime is 66356544347. The reversal of 66356544336 is 63344565366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9732001 + ... + 9738816.

Almost surely, 2^66356544336 is an apocalyptic number.

It is an amenable number.

66356544336 is an abundant number, since it is smaller than the sum of its proper divisors (107478918768).

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

66356544336 is a wasteful number, since it uses less digits than its factorization.

66356544336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19470899 (or 19470893 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 51.

The spelling of 66356544336 in words is "sixty-six billion, three hundred fifty-six million, five hundred forty-four thousand, three hundred thirty-six".