663580 has 12 divisors (see below), whose sum is σ = 1393560. Its totient is φ = 265424.

The previous prime is 663571. The next prime is 663581. The reversal of 663580 is 85366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16570 + ... + 16609.

It is an arithmetic number, because the mean of its divisors is an integer number (116130).

2⁶⁶³⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

663580 is an abundant number, since it is smaller than the sum of its proper divisors (729980).

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

663580 is a wasteful number, since it uses less digits than its factorization.

663580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33188 (or 33186 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 663580 is about 814.6041983688. The cubic root of 663580 is about 87.2230152755.

The spelling of 663580 in words is "six hundred sixty-three thousand, five hundred eighty".