66013284856 has 16 divisors (see below), whose sum is σ = 123915097800. Its totient is φ = 32969258784.

The previous prime is 66013284833. The next prime is 66013284947. The reversal of 66013284856 is 65848231066.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4665451 + ... + 4679578.

Almost surely, 2^66013284856 is an apocalyptic number.

It is an amenable number.

66013284856 is a deficient number, since it is larger than the sum of its proper divisors (57901812944).

66013284856 is a wasteful number, since it uses less digits than its factorization.

66013284856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9345918 (or 9345914 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 66013284856 in words is "sixty-six billion, thirteen million, two hundred eighty-four thousand, eight hundred fifty-six".