165606433 has 8 divisors (see below), whose sum is σ = 171449600. Its totient is φ = 159794640.

The previous prime is 165606383. The next prime is 165606473. The reversal of 165606433 is 334606561.

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-165606433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165606473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3166 + ... + 18472.

It is an arithmetic number, because the mean of its divisors is an integer number (21431200).

Almost surely, 2^165606433 is an apocalyptic number.

It is an amenable number.

165606433 is a deficient number, since it is larger than the sum of its proper divisors (5843167).

165606433 is a wasteful number, since it uses less digits than its factorization.

165606433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15687.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 165606433 is about 12868.8163014319. The cubic root of 165606433 is about 549.1517867679.

The spelling of 165606433 in words is "one hundred sixty-five million, six hundred six thousand, four hundred thirty-three".