66250808556 has 12 divisors (see below), whose sum is σ = 154585219992. Its totient is φ = 22083602848.

The previous prime is 66250808549. The next prime is 66250808593. The reversal of 66250808556 is 65580805266.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 66250808499 and 66250808508.

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, 2760450345 + ... + 2760450368.

It is an arithmetic number, because the mean of its divisors is an integer number (12882101666).

Almost surely, 2^66250808556 is an apocalyptic number.

It is an amenable number.

66250808556 is an abundant number, since it is smaller than the sum of its proper divisors (88334411436).

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

66250808556 is a wasteful number, since it uses less digits than its factorization.

66250808556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520900720 (or 5520900718 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 66250808556 in words is "sixty-six billion, two hundred fifty million, eight hundred eight thousand, five hundred fifty-six".