161674566 has 8 divisors (see below), whose sum is σ = 323349144. Its totient is φ = 53891520.

The previous prime is 161674561. The next prime is 161674589. The reversal of 161674566 is 665476161.

It is a happy number.

161674566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

161674566 is an admirable number.

It is a super-2 number, since 2×161674566² = 52277330582576712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161674561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13472875 + ... + 13472886.

It is an arithmetic number, because the mean of its divisors is an integer number (40418643).

Almost surely, 2^161674566 is an apocalyptic number.

161674566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161674566 is a wasteful number, since it uses less digits than its factorization.

161674566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26945766.

The product of its digits is 181440, while the sum is 42.

The square root of 161674566 is about 12715.1313795808. The cubic root of 161674566 is about 544.7709005375.

The spelling of 161674566 in words is "one hundred sixty-one million, six hundred seventy-four thousand, five hundred sixty-six".