665207 has 2 divisors, whose sum is σ = 665208. Its totient is φ = 665206.

The previous prime is 665201. The next prime is 665213. The reversal of 665207 is 702566.

It is a balanced prime because it is at equal distance from previous prime (665201) and next prime (665213).

It is a cyclic number.

It is not a de Polignac number, because 665207 - 2¹⁸ = 403063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665201) 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 as a sum of consecutive naturals, namely, 332603 + 332604.

It is an arithmetic number, because the mean of its divisors is an integer number (332604).

2⁶⁶⁵²⁰⁷ is an apocalyptic number.

665207 is a deficient number, since it is larger than the sum of its proper divisors (1).

665207 is an equidigital number, since it uses as much as digits as its factorization.

665207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 665207 is about 815.6022314830. The cubic root of 665207 is about 87.2942430708.

The spelling of 665207 in words is "six hundred sixty-five thousand, two hundred seven".