665307 has 16 divisors (see below), whose sum is σ = 1011360. Its totient is φ = 432000.

The previous prime is 665303. The next prime is 665311. The reversal of 665307 is 703566.

665307 is a `hidden beast` number, since 6 + 653 + 0 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (665303) and next prime (665311).

It is not a de Polignac number, because 665307 - 2² = 665303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (63210).

2⁶⁶⁵³⁰⁷ is an apocalyptic number.

665307 is a deficient number, since it is larger than the sum of its proper divisors (346053).

665307 is a wasteful number, since it uses less digits than its factorization.

665307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 665307 is about 815.6635335725. The cubic root of 665307 is about 87.2986171413.

The spelling of 665307 in words is "six hundred sixty-five thousand, three hundred seven".