166161105050556 has 48 divisors (see below), whose sum is σ = 483377760149760. Its totient is φ = 43158728584320.

The previous prime is 166161105050539. The next prime is 166161105050579. The reversal of 166161105050556 is 655050501161661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89914016961 + ... + 89914018808.

It is an arithmetic number, because the mean of its divisors is an integer number (10070370003120).

Almost surely, 2^{166161105050556} is an apocalyptic number.

It is an amenable number.

166161105050556 is an abundant number, since it is smaller than the sum of its proper divisors (317216655099204).

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

166161105050556 is a wasteful number, since it uses less digits than its factorization.

166161105050556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179828035794 (or 179828035792 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 166161105050556 in words is "one hundred sixty-six trillion, one hundred sixty-one billion, one hundred five million, fifty thousand, five hundred fifty-six".