669817008 has 120 divisors (see below), whose sum is σ = 2147996448. Its totient is φ = 190872576.

The previous prime is 669816997. The next prime is 669817019. The reversal of 669817008 is 800718966.

It is a happy number.

669817008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (669816997) and next prime (669817019).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560860 + ... + 562052.

Almost surely, 2^669817008 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 669817008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1073998224).

669817008 is an abundant number, since it is smaller than the sum of its proper divisors (1478179440).

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

669817008 is a wasteful number, since it uses less digits than its factorization.

669817008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771 (or 1762 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 669817008 is about 25880.8231708344. The cubic root of 669817008 is about 874.9543412365.

The spelling of 669817008 in words is "six hundred sixty-nine million, eight hundred seventeen thousand, eight".