165035665 has 16 divisors (see below), whose sum is σ = 205286400. Its totient is φ = 127218112.

The previous prime is 165035641. The next prime is 165035669. The reversal of 165035665 is 566530561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 165035665 - 2¹⁹ = 164511377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165035669) 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, 103464 + ... + 105046.

It is an arithmetic number, because the mean of its divisors is an integer number (12830400).

Almost surely, 2^165035665 is an apocalyptic number.

It is an amenable number.

165035665 is a deficient number, since it is larger than the sum of its proper divisors (40250735).

165035665 is a wasteful number, since it uses less digits than its factorization.

165035665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 165035665 is about 12846.6207618969. The cubic root of 165035665 is about 548.5201707045.

The spelling of 165035665 in words is "one hundred sixty-five million, thirty-five thousand, six hundred sixty-five".