669894 has 16 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 221960.

The previous prime is 669887. The next prime is 669901. The reversal of 669894 is 498966.

It is an interprime number because it is at equal distance from previous prime (669887) and next prime (669901).

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 669894.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁶⁶⁹⁸⁹⁴ is an apocalyptic number.

669894 is an abundant number, since it is smaller than the sum of its proper divisors (677946).

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

669894 is a wasteful number, since it uses less digits than its factorization.

669894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675.

The product of its digits is 93312, while the sum is 42.

The square root of 669894 is about 818.4705248205. The cubic root of 669894 is about 87.4987863777.

The spelling of 669894 in words is "six hundred sixty-nine thousand, eight hundred ninety-four".