165659437 has 8 divisors (see below), whose sum is σ = 167207040. Its totient is φ = 164118960.

The previous prime is 165659369. The next prime is 165659477. The reversal of 165659437 is 734956561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165659437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165659477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52264 + ... + 55342.

It is an arithmetic number, because the mean of its divisors is an integer number (20900880).

Almost surely, 2^165659437 is an apocalyptic number.

It is an amenable number.

165659437 is a deficient number, since it is larger than the sum of its proper divisors (1547603).

165659437 is a wasteful number, since it uses less digits than its factorization.

165659437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563.

The product of its digits is 680400, while the sum is 46.

The square root of 165659437 is about 12870.8755335447. The cubic root of 165659437 is about 549.2103676978.

The spelling of 165659437 in words is "one hundred sixty-five million, six hundred fifty-nine thousand, four hundred thirty-seven".