660449 has 2 divisors, whose sum is σ = 660450. Its totient is φ = 660448.

The previous prime is 660409. The next prime is 660493. The reversal of 660449 is 944066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 20449 = 800^2 + 143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (660409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330224 + 330225.

It is an arithmetic number, because the mean of its divisors is an integer number (330225).

2⁶⁶⁰⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

660449 is a deficient number, since it is larger than the sum of its proper divisors (1).

660449 is an equidigital number, since it uses as much as digits as its factorization.

660449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 660449 is about 812.6801338780. The cubic root of 660449 is about 87.0856161628.

The spelling of 660449 in words is "six hundred sixty thousand, four hundred forty-nine".