161071566 has 32 divisors (see below), whose sum is σ = 341949600. Its totient is φ = 50405376.

The previous prime is 161071517. The next prime is 161071571. The reversal of 161071566 is 665170161.

161071566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 44040 + ... + 47556.

It is an arithmetic number, because the mean of its divisors is an integer number (10685925).

Almost surely, 2^161071566 is an apocalyptic number.

161071566 is an abundant number, since it is smaller than the sum of its proper divisors (180878034).

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

161071566 is a wasteful number, since it uses less digits than its factorization.

161071566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 161071566 is about 12691.3973225961. The cubic root of 161071566 is about 544.0927767622.

The spelling of 161071566 in words is "one hundred sixty-one million, seventy-one thousand, five hundred sixty-six".