665296 has 20 divisors (see below), whose sum is σ = 1320352. Its totient is φ = 324576.

The previous prime is 665293. The next prime is 665299. The reversal of 665296 is 692566.

665296 = 31² + 32² + ... + 126².

It is an interprime number because it is at equal distance from previous prime (665293) and next prime (665299).

It is a d-powerful number, because it can be written as 6⁴ + 6⁵ + 2 + 5⁷ + 9⁶ + 6⁶ .

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205 + ... + 1171.

2⁶⁶⁵²⁹⁶ is an apocalyptic number.

It is an amenable number.

665296 is a deficient number, since it is larger than the sum of its proper divisors (655056).

665296 is a wasteful number, since it uses less digits than its factorization.

665296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1012 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 665296 is about 815.6567905682. The cubic root of 665296 is about 87.2981360150.

It can be divided in two parts, 665 and 296, that added together give a square (961 = 31²).

The spelling of 665296 in words is "six hundred sixty-five thousand, two hundred ninety-six".