665343 has 24 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 371664.

The previous prime is 665311. The next prime is 665351. The reversal of 665343 is 343566.

665343 is a `hidden beast` number, since 6 + 653 + 4 + 3 = 666.

It is not a de Polignac number, because 665343 - 2⁵ = 665311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3628 + ... + 3806.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2⁶⁶⁵³⁴³ is an apocalyptic number.

665343 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

665343 is a deficient number, since it is larger than the sum of its proper divisors (457857).

665343 is a wasteful number, since it uses less digits than its factorization.

665343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 248 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 665343 is about 815.6856011969. The cubic root of 665343 is about 87.3001916994.

The spelling of 665343 in words is "six hundred sixty-five thousand, three hundred forty-three".