669264 has 40 divisors (see below), whose sum is σ = 1761792. Its totient is φ = 218880.

The previous prime is 669247. The next prime is 669271. The reversal of 669264 is 462966.

It is a congruent number.

It is an unprimeable number.

669264 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 7 ways as a sum of consecutive naturals, for example, 3409 + ... + 3599.

2⁶⁶⁹²⁶⁴ 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 669264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880896).

669264 is an abundant number, since it is smaller than the sum of its proper divisors (1092528).

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

669264 is a wasteful number, since it uses less digits than its factorization.

669264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 269 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 669264 is about 818.0855700964. The cubic root of 669264 is about 87.4713484423.

The spelling of 669264 in words is "six hundred sixty-nine thousand, two hundred sixty-four".