165959598 has 16 divisors (see below), whose sum is σ = 379336320. Its totient is φ = 47417016.

The previous prime is 165959569. The next prime is 165959611. The reversal of 165959598 is 895959561.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975668 + ... + 1975751.

It is an arithmetic number, because the mean of its divisors is an integer number (23708520).

Almost surely, 2^165959598 is an apocalyptic number.

165959598 is an abundant number, since it is smaller than the sum of its proper divisors (213376722).

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

165959598 is a wasteful number, since it uses less digits than its factorization.

165959598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951431.

The product of its digits is 4374000, while the sum is 57.

The square root of 165959598 is about 12882.5307296354. The cubic root of 165959598 is about 549.5418752584.

The spelling of 165959598 in words is "one hundred sixty-five million, nine hundred fifty-nine thousand, five hundred ninety-eight".