669008 has 10 divisors (see below), whose sum is σ = 1296234. Its totient is φ = 334496.

The previous prime is 668999. The next prime is 669023. The reversal of 669008 is 800966.

It can be written as a sum of positive squares in only one way, i.e., 446224 + 222784 = 668^2 + 472^2 .

It is a congruent number.

It is an unprimeable number.

669008 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 as a sum of consecutive naturals, namely, 20891 + ... + 20922.

2⁶⁶⁹⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

669008 is a deficient number, since it is larger than the sum of its proper divisors (627226).

669008 is a wasteful number, since it uses less digits than its factorization.

669008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41821 (or 41815 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 669008 is about 817.9290922812. The cubic root of 669008 is about 87.4601941390.

The spelling of 669008 in words is "six hundred sixty-nine thousand, eight".