66105565606056 has 16 divisors (see below), whose sum is σ = 165263914015200. Its totient is φ = 22035188535344.

The previous prime is 66105565606049. The next prime is 66105565606111. The reversal of 66105565606056 is 65060656550166.

It is a junction number, because it is equal to n+sod(n) for n = 66105565605987 and 66105565606005.

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, 1377199283436 + ... + 1377199283483.

It is an arithmetic number, because the mean of its divisors is an integer number (10328994625950).

Almost surely, 2^{66105565606056} is an apocalyptic number.

It is an amenable number.

66105565606056 is an abundant number, since it is smaller than the sum of its proper divisors (99158348409144).

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

66105565606056 is a wasteful number, since it uses less digits than its factorization.

66105565606056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754398566928 (or 2754398566924 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 66105565606056 in words is "sixty-six trillion, one hundred five billion, five hundred sixty-five million, six hundred six thousand, fifty-six".