161606115105966 has 48 divisors (see below), whose sum is σ = 358280251939584. Its totient is φ = 52621754272272.

The previous prime is 161606115105931. The next prime is 161606115105971. The reversal of 161606115105966 is 669501511606161.

161606115105966 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 6 + 11 + 510 + 59 + 66 = 666.

It is a super-2 number, since 2×161606115105966² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182180656 + ... + 183065571.

It is an arithmetic number, because the mean of its divisors is an integer number (7464171915408).

Almost surely, 2^{161606115105966} is an apocalyptic number.

161606115105966 is an abundant number, since it is smaller than the sum of its proper divisors (196674136833618).

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

161606115105966 is a wasteful number, since it uses less digits than its factorization.

161606115105966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365246805 (or 365246802 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 161606115105966 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred fifteen million, one hundred five thousand, nine hundred sixty-six".