665295 has 16 divisors (see below), whose sum is σ = 1127520. Its totient is φ = 333824.

The previous prime is 665293. The next prime is 665299. The reversal of 665295 is 592566.

665295 = 43² + 44² + ... + 127².

It is a cyclic number.

It is not a de Polignac number, because 665295 - 2¹ = 665293 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1050 + ... + 1559.

It is an arithmetic number, because the mean of its divisors is an integer number (70470).

2⁶⁶⁵²⁹⁵ is an apocalyptic number.

665295 is a deficient number, since it is larger than the sum of its proper divisors (462225).

665295 is a wasteful number, since it uses less digits than its factorization.

665295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

The product of its digits is 16200, while the sum is 33.

The square root of 665295 is about 815.6561775650. The cubic root of 665295 is about 87.2980922760.

The spelling of 665295 in words is "six hundred sixty-five thousand, two hundred ninety-five".