165501505 has 8 divisors (see below), whose sum is σ = 213878952. Its totient is φ = 122216448.

The previous prime is 165501503. The next prime is 165501517. The reversal of 165501505 is 505105561.

165501505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1046529 + 164454976 = 1023^2 + 12824^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 165501505 - 2¹ = 165501503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165501503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273024 + ... + 1273153.

It is an arithmetic number, because the mean of its divisors is an integer number (26734869).

Almost surely, 2^165501505 is an apocalyptic number.

It is an amenable number.

165501505 is a deficient number, since it is larger than the sum of its proper divisors (48377447).

165501505 is a wasteful number, since it uses less digits than its factorization.

165501505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546195.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 165501505 is about 12864.7388236217. The cubic root of 165501505 is about 549.0357816677.

The spelling of 165501505 in words is "one hundred sixty-five million, five hundred one thousand, five hundred five".