165066605 has 16 divisors (see below), whose sum is σ = 216385344. Its totient is φ = 119882880.

The previous prime is 165066581. The next prime is 165066613. The reversal of 165066605 is 506660561.

It is not a de Polignac number, because 165066605 - 2¹⁶ = 165001069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49934 + ... + 53136.

It is an arithmetic number, because the mean of its divisors is an integer number (13524084).

Almost surely, 2^165066605 is an apocalyptic number.

It is an amenable number.

165066605 is a deficient number, since it is larger than the sum of its proper divisors (51318739).

165066605 is a wasteful number, since it uses less digits than its factorization.

165066605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156.

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

The square root of 165066605 is about 12847.8249131906. The cubic root of 165066605 is about 548.5544464344.

The spelling of 165066605 in words is "one hundred sixty-five million, sixty-six thousand, six hundred five".