165501506 has 8 divisors (see below), whose sum is σ = 249337020. Its totient is φ = 82389168.

The previous prime is 165501503. The next prime is 165501517. The reversal of 165501506 is 605105561.

165501506 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 161925625 + 3575881 = 12725^2 + 1891^2 .

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

It is not an unprimeable number, because it can be changed into a prime (165501503) 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, 180221 + ... + 181136.

Almost surely, 2^165501506 is an apocalyptic number.

165501506 is a deficient number, since it is larger than the sum of its proper divisors (83835514).

165501506 is a wasteful number, since it uses less digits than its factorization.

165501506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361588.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 165501506 is about 12864.7388624876. The cubic root of 165501506 is about 549.0357827735.

The spelling of 165501506 in words is "one hundred sixty-five million, five hundred one thousand, five hundred six".