669008000 has 64 divisors (see below), whose sum is σ = 1663360920. Its totient is φ = 267596800.

The previous prime is 669007981. The next prime is 669008017. The reversal of 669008000 is 800966.

It can be written as a sum of positive squares in 4 ways, for example, as 78712384 + 590295616 = 8872^2 + 24296^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4907 + ... + 36906.

Almost surely, 2^669008000 is an apocalyptic number.

It is an amenable number.

669008000 is an abundant number, since it is smaller than the sum of its proper divisors (994352920).

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

669008000 is an equidigital number, since it uses as much as digits as its factorization.

669008000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41842 (or 41820 counting only the distinct ones).

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

The square root of 669008000 is about 25865.1889612274. The cubic root of 669008000 is about 874.6019413900.

Adding to 669008000 its reverse (800966), we get a palindrome (669808966).

The spelling of 669008000 in words is "six hundred sixty-nine million, eight thousand".