161606001560166 has 48 divisors (see below), whose sum is σ = 364314107766960. Its totient is φ = 51710484557760.

The previous prime is 161606001560149. The next prime is 161606001560167. The reversal of 161606001560166 is 661065100606161.

161606001560166 is a `hidden beast` number, since 1 + 6 + 16 + 0 + 60 + 0 + 1 + 560 + 16 + 6 = 666.

It is a super-2 number, since 2×161606001560166² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606001560167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 894678600 + ... + 894859211.

It is an arithmetic number, because the mean of its divisors is an integer number (7589877245145).

Almost surely, 2^{161606001560166} is an apocalyptic number.

161606001560166 is an abundant number, since it is smaller than the sum of its proper divisors (202708106206794).

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

161606001560166 is a wasteful number, since it uses less digits than its factorization.

161606001560166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789538021 (or 1789538018 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 161606001560166 in words is "one hundred sixty-one trillion, six hundred six billion, one million, five hundred sixty thousand, one hundred sixty-six".