165988474 has 8 divisors (see below), whose sum is σ = 253680660. Its totient is φ = 81428256.

The previous prime is 165988469. The next prime is 165988507. The reversal of 165988474 is 474889561.

165988474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165508225 + 480249 = 12865^2 + 693^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782859 + ... + 783070.

Almost surely, 2^165988474 is an apocalyptic number.

165988474 is a deficient number, since it is larger than the sum of its proper divisors (87692186).

165988474 is a wasteful number, since it uses less digits than its factorization.

165988474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565984.

The product of its digits is 1935360, while the sum is 52.

The square root of 165988474 is about 12883.6514234125. The cubic root of 165988474 is about 549.5737457681.

The spelling of 165988474 in words is "one hundred sixty-five million, nine hundred eighty-eight thousand, four hundred seventy-four".