660464 has 20 divisors (see below), whose sum is σ = 1462704. Its totient is φ = 283008.

The previous prime is 660449. The next prime is 660493. The reversal of 660464 is 464066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837 + ... + 3060.

2⁶⁶⁰⁴⁶⁴ is an apocalyptic number.

It is an amenable number.

660464 is an abundant number, since it is smaller than the sum of its proper divisors (802240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660464 is a wasteful number, since it uses less digits than its factorization.

660464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912 (or 5906 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 660464 is about 812.6893625488. The cubic root of 660464 is about 87.0862754488.

The spelling of 660464 in words is "six hundred sixty thousand, four hundred sixty-four".