669884 has 6 divisors (see below), whose sum is σ = 1172304. Its totient is φ = 334940.

The previous prime is 669869. The next prime is 669887. The reversal of 669884 is 488966.

669884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669884.

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 as a sum of consecutive naturals, namely, 83732 + ... + 83739.

It is an arithmetic number, because the mean of its divisors is an integer number (195384).

2⁶⁶⁹⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

669884 is a deficient number, since it is larger than the sum of its proper divisors (502420).

669884 is a wasteful number, since it uses less digits than its factorization.

669884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167475 (or 167473 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 669884 is about 818.4644158423. The cubic root of 669884 is about 87.4983509893.

The spelling of 669884 in words is "six hundred sixty-nine thousand, eight hundred eighty-four".