165580567 has 4 divisors (see below), whose sum is σ = 165610816. Its totient is φ = 165550320.

The previous prime is 165580559. The next prime is 165580589. The reversal of 165580567 is 765085561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 765085561 = 17 ⋅45005033.

It is a cyclic number.

It is not a de Polignac number, because 165580567 - 2³ = 165580559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165580267) by changing a digit.

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, 4359 + ... + 18712.

It is an arithmetic number, because the mean of its divisors is an integer number (41402704).

Almost surely, 2^165580567 is an apocalyptic number.

165580567 is a deficient number, since it is larger than the sum of its proper divisors (30249).

165580567 is an equidigital number, since it uses as much as digits as its factorization.

165580567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30248.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 165580567 is about 12867.8112746496. The cubic root of 165580567 is about 549.1231946828.

The spelling of 165580567 in words is "one hundred sixty-five million, five hundred eighty thousand, five hundred sixty-seven".