165500601 has 16 divisors (see below), whose sum is σ = 252595200. Its totient is φ = 94420368.

The previous prime is 165500567. The next prime is 165500603. The reversal of 165500601 is 106005561.

It is not a de Polignac number, because 165500601 - 2¹⁰ = 165499577 is a prime.

It is a super-2 number, since 2×165500601² = 54780897862722402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165500603) 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 15 ways as a sum of consecutive naturals, for example, 7860 + ... + 19818.

It is an arithmetic number, because the mean of its divisors is an integer number (15787200).

Almost surely, 2^165500601 is an apocalyptic number.

It is an amenable number.

165500601 is a deficient number, since it is larger than the sum of its proper divisors (87094599).

165500601 is a wasteful number, since it uses less digits than its factorization.

165500601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12628.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 165500601 is about 12864.7036887757. The cubic root of 165500601 is about 549.0347820207.

The spelling of 165500601 in words is "one hundred sixty-five million, five hundred thousand, six hundred one".