165500566 has 32 divisors (see below), whose sum is σ = 310401792. Its totient is φ = 64294560.

The previous prime is 165500557. The next prime is 165500567. The reversal of 165500566 is 665005561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165500567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59785 + ... + 62491.

It is an arithmetic number, because the mean of its divisors is an integer number (9700056).

Almost surely, 2^165500566 is an apocalyptic number.

165500566 is a deficient number, since it is larger than the sum of its proper divisors (144901226).

165500566 is a wasteful number, since it uses less digits than its factorization.

165500566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 165500566 is about 12864.7023284645. The cubic root of 165500566 is about 549.0347433174.

The spelling of 165500566 in words is "one hundred sixty-five million, five hundred thousand, five hundred sixty-six".