161866832 has 10 divisors (see below), whose sum is σ = 313617018. Its totient is φ = 80933408.

The previous prime is 161866819. The next prime is 161866883. The reversal of 161866832 is 238668161.

It can be written as a sum of positive squares in only one way, i.e., 97930816 + 63936016 = 9896^2 + 7996^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161866832.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5058323 + ... + 5058354.

Almost surely, 2^161866832 is an apocalyptic number.

It is an amenable number.

161866832 is a deficient number, since it is larger than the sum of its proper divisors (151750186).

161866832 is a wasteful number, since it uses less digits than its factorization.

161866832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10116685 (or 10116679 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 161866832 is about 12722.6896527425. The cubic root of 161866832 is about 544.9867651024.

The spelling of 161866832 in words is "one hundred sixty-one million, eight hundred sixty-six thousand, eight hundred thirty-two".