4165566 has 8 divisors (see below), whose sum is σ = 8331144. Its totient is φ = 1388520.

The previous prime is 4165549. The next prime is 4165573. The reversal of 4165566 is 6655614.

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

4165566 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 347125 + ... + 347136.

It is an arithmetic number, because the mean of its divisors is an integer number (1041393).

Almost surely, 2^4165566 is an apocalyptic number.

4165566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4165566 is a wasteful number, since it uses less digits than its factorization.

4165566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694266.

The product of its digits is 21600, while the sum is 33.

The square root of 4165566 is about 2040.9718273411. The cubic root of 4165566 is about 160.9007270934.

The spelling of 4165566 in words is "four million, one hundred sixty-five thousand, five hundred sixty-six".