669500 has 48 divisors (see below), whose sum is σ = 1589952. Its totient is φ = 244800.

The previous prime is 669481. The next prime is 669527. The reversal of 669500 is 5966.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 669500.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6449 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (33124).

2⁶⁶⁹⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794976).

669500 is an abundant number, since it is smaller than the sum of its proper divisors (920452).

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

669500 is a wasteful number, since it uses less digits than its factorization.

669500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 669500 is about 818.2297965731. The cubic root of 669500 is about 87.4816287962.

The spelling of 669500 in words is "six hundred sixty-nine thousand, five hundred".