166656065556 has 24 divisors (see below), whose sum is σ = 399373996000. Its totient is φ = 54050615712.

The previous prime is 166656065501. The next prime is 166656065579. The reversal of 166656065556 is 655560656661.

It is a junction number, because it is equal to n+sod(n) for n = 166656065496 and 166656065505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187675306 + ... + 187676193.

Almost surely, 2^166656065556 is an apocalyptic number.

It is an amenable number.

166656065556 is an abundant number, since it is smaller than the sum of its proper divisors (232717930444).

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

166656065556 is a wasteful number, since it uses less digits than its factorization.

166656065556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375351543 (or 375351541 counting only the distinct ones).

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

The spelling of 166656065556 in words is "one hundred sixty-six billion, six hundred fifty-six million, sixty-five thousand, five hundred fifty-six".