166220160056 has 16 divisors (see below), whose sum is σ = 313754499000. Its totient is φ = 82552293664.

The previous prime is 166220160047. The next prime is 166220160079. The reversal of 166220160056 is 650061022661.

It is a junction number, because it is equal to n+sod(n) for n = 166220159998 and 166220160025.

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, 69722030 + ... + 69724413.

Almost surely, 2^166220160056 is an apocalyptic number.

It is an amenable number.

166220160056 is a deficient number, since it is larger than the sum of its proper divisors (147534338944).

166220160056 is a wasteful number, since it uses less digits than its factorization.

166220160056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139446598 (or 139446594 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 166220160056 in words is "one hundred sixty-six billion, two hundred twenty million, one hundred sixty thousand, fifty-six".