669954 has 8 divisors (see below), whose sum is σ = 1339920. Its totient is φ = 223316.

The previous prime is 669947. The next prime is 669971. The reversal of 669954 is 459966.

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

669954 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669954.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55824 + ... + 55835.

It is an arithmetic number, because the mean of its divisors is an integer number (167490).

2⁶⁶⁹⁹⁵⁴ is an apocalyptic number.

669954 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.

669954 is a wasteful number, since it uses less digits than its factorization.

669954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111664.

The product of its digits is 58320, while the sum is 39.

The square root of 669954 is about 818.5071777327. The cubic root of 669954 is about 87.5013986171.

The spelling of 669954 in words is "six hundred sixty-nine thousand, nine hundred fifty-four".