165605606 has 8 divisors (see below), whose sum is σ = 252480864. Its totient is φ = 81445320.

The previous prime is 165605579. The next prime is 165605617. The reversal of 165605606 is 606506561.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 678590 + ... + 678833.

It is an arithmetic number, because the mean of its divisors is an integer number (31560108).

Almost surely, 2^165605606 is an apocalyptic number.

165605606 is a deficient number, since it is larger than the sum of its proper divisors (86875258).

165605606 is a wasteful number, since it uses less digits than its factorization.

165605606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357486.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 165605606 is about 12868.7841694544. The cubic root of 165605606 is about 549.1508726543.

The spelling of 165605606 in words is "one hundred sixty-five million, six hundred five thousand, six hundred six".