669880 has 16 divisors (see below), whose sum is σ = 1507320. Its totient is φ = 267936.

The previous prime is 669869. The next prime is 669887. The reversal of 669880 is 88966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669887) 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, 8334 + ... + 8413.

2⁶⁶⁹⁸⁸⁰ is an apocalyptic number.

It is an amenable number.

669880 is an abundant number, since it is smaller than the sum of its proper divisors (837440).

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

669880 is a wasteful number, since it uses less digits than its factorization.

669880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758 (or 16754 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 669880 is about 818.4619722382. The cubic root of 669880 is about 87.4981768328.

The spelling of 669880 in words is "six hundred sixty-nine thousand, eight hundred eighty".