669846 has 8 divisors (see below), whose sum is σ = 1339704. Its totient is φ = 223280.

The previous prime is 669839. The next prime is 669847. The reversal of 669846 is 648966.

It is a sphenic number, since it is the product of 3 distinct primes.

669846 is an admirable number.

It is a Curzon number.

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 669846.

It is not an unprimeable number, because it can be changed into a prime (669847) by changing a digit.

669846 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55815 + ... + 55826.

It is an arithmetic number, because the mean of its divisors is an integer number (167463).

2⁶⁶⁹⁸⁴⁶ is an apocalyptic number.

669846 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

669846 is a wasteful number, since it uses less digits than its factorization.

669846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111646.

The product of its digits is 62208, while the sum is 39.

The square root of 669846 is about 818.4412013089. The cubic root of 669846 is about 87.4966964739.

The spelling of 669846 in words is "six hundred sixty-nine thousand, eight hundred forty-six".