665460329 has 2 divisors, whose sum is σ = 665460330. Its totient is φ = 665460328.

The previous prime is 665460319. The next prime is 665460331. The reversal of 665460329 is 923064566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664608400 + 851929 = 25780^2 + 923^2 .

It is a cyclic number.

It is not a de Polignac number, because 665460329 - 2²⁰ = 664411753 is a prime.

Together with 665460331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (665460319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332730164 + 332730165.

It is an arithmetic number, because the mean of its divisors is an integer number (332730165).

Almost surely, 2^665460329 is an apocalyptic number.

It is an amenable number.

665460329 is a deficient number, since it is larger than the sum of its proper divisors (1).

665460329 is an equidigital number, since it uses as much as digits as its factorization.

665460329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 665460329 is about 25796.5177688773. The cubic root of 665460329 is about 873.0532300871.

The spelling of 665460329 in words is "six hundred sixty-five million, four hundred sixty thousand, three hundred twenty-nine".