669580 has 12 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 267824.

The previous prime is 669577. The next prime is 669607. The reversal of 669580 is 85966.

669580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 16720 + ... + 16759.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2⁶⁶⁹⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

669580 is an abundant number, since it is smaller than the sum of its proper divisors (736580).

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

669580 is a wasteful number, since it uses less digits than its factorization.

669580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33488 (or 33486 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 669580 is about 818.2786811350. The cubic root of 669580 is about 87.4851131136.

The spelling of 669580 in words is "six hundred sixty-nine thousand, five hundred eighty".