669460 has 48 divisors (see below), whose sum is σ = 1632960. Its totient is φ = 227840.

The previous prime is 669451. The next prime is 669463. The reversal of 669460 is 64966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3651 + ... + 3829.

It is an arithmetic number, because the mean of its divisors is an integer number (34020).

2⁶⁶⁹⁴⁶⁰ 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 669460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (816480).

669460 is an abundant number, since it is smaller than the sum of its proper divisors (963500).

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

669460 is a wasteful number, since it uses less digits than its factorization.

669460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 669460 is about 818.2053531969. The cubic root of 669460 is about 87.4798865334.

The spelling of 669460 in words is "six hundred sixty-nine thousand, four hundred sixty".