665813295 has 96 divisors (see below), whose sum is σ = 1415232000. Its totient is φ = 282776832.

The previous prime is 665813249. The next prime is 665813297. The reversal of 665813295 is 592318566.

665813295 is a `hidden beast` number, since 66 + 581 + 3 + 2 + 9 + 5 = 666.

It is not a de Polignac number, because 665813295 - 2¹³ = 665805103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 665813295.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665813297) 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 95 ways as a sum of consecutive naturals, for example, 316156 + ... + 318254.

It is an arithmetic number, because the mean of its divisors is an integer number (14742000).

Almost surely, 2^665813295 is an apocalyptic number.

665813295 is an abundant number, since it is smaller than the sum of its proper divisors (749418705).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665813295 is a wasteful number, since it uses less digits than its factorization.

665813295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2186 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 665813295 is about 25803.3582116747. The cubic root of 665813295 is about 873.2075611698.

The spelling of 665813295 in words is "six hundred sixty-five million, eight hundred thirteen thousand, two hundred ninety-five".