660459 has 8 divisors (see below), whose sum is σ = 927040. Its totient is φ = 417096.

The previous prime is 660449. The next prime is 660493. The reversal of 660459 is 954066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660459 - 2⁹ = 659947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660409) 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 7 ways as a sum of consecutive naturals, for example, 5737 + ... + 5850.

It is an arithmetic number, because the mean of its divisors is an integer number (115880).

2⁶⁶⁰⁴⁵⁹ is an apocalyptic number.

660459 is a deficient number, since it is larger than the sum of its proper divisors (266581).

660459 is a wasteful number, since it uses less digits than its factorization.

660459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11609.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 660459 is about 812.6862863369. The cubic root of 660459 is about 87.0860556879.

The spelling of 660459 in words is "six hundred sixty thousand, four hundred fifty-nine".