66200017070056 has 16 divisors (see below), whose sum is σ = 124125119620740. Its totient is φ = 33099985171200.

The previous prime is 66200017069981. The next prime is 66200017070071. The reversal of 66200017070056 is 65007071000266.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65836444249156 + 363572820900 = 8113966^2 + 602970^2 .

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, 17618080 + ... + 21042736.

Almost surely, 2^{66200017070056} is an apocalyptic number.

It is an amenable number.

66200017070056 is a deficient number, since it is larger than the sum of its proper divisors (57925102550684).

66200017070056 is a wasteful number, since it uses less digits than its factorization.

66200017070056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5840964 (or 5840960 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 66200017070056 in words is "sixty-six trillion, two hundred billion, seventeen million, seventy thousand, fifty-six".