65605165 has 4 divisors (see below), whose sum is σ = 78726204. Its totient is φ = 52484128.

The previous prime is 65605151. The next prime is 65605187. The reversal of 65605165 is 56150656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28419561 + 37185604 = 5331^2 + 6098^2 .

It is a cyclic number.

It is not a de Polignac number, because 65605165 - 2⁷ = 65605037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65605165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6560512 + ... + 6560521.

It is an arithmetic number, because the mean of its divisors is an integer number (19681551).

Almost surely, 2^65605165 is an apocalyptic number.

It is an amenable number.

65605165 is a deficient number, since it is larger than the sum of its proper divisors (13121039).

65605165 is a wasteful number, since it uses less digits than its factorization.

65605165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13121038.

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

The square root of 65605165 is about 8099.7015377111. The cubic root of 65605165 is about 403.3165194973.

The spelling of 65605165 in words is "sixty-five million, six hundred five thousand, one hundred sixty-five".