665029 has 2 divisors, whose sum is σ = 665030. Its totient is φ = 665028.

The previous prime is 665017. The next prime is 665039. The reversal of 665029 is 920566.

665029 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492804 + 172225 = 702^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 665029 - 2⁵ = 664997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 664988 and 665006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332514 + 332515.

It is an arithmetic number, because the mean of its divisors is an integer number (332515).

2⁶⁶⁵⁰²⁹ is an apocalyptic number.

It is an amenable number.

665029 is a deficient number, since it is larger than the sum of its proper divisors (1).

665029 is an equidigital number, since it uses as much as digits as its factorization.

665029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 665029 is about 815.4931023620. The cubic root of 665029 is about 87.2864561407.

The spelling of 665029 in words is "six hundred sixty-five thousand, twenty-nine".