669606912 has 352 divisors, whose sum is σ = 2255957760. Its totient is φ = 197074944.

The previous prime is 669606901. The next prime is 669606919. The reversal of 669606912 is 219606966.

It is not an unprimeable number, because it can be changed into a prime (669606919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29113333 + ... + 29113355.

Almost surely, 2^669606912 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 669606912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1127978880).

669606912 is an abundant number, since it is smaller than the sum of its proper divisors (1586350848).

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

669606912 is an equidigital number, since it uses as much as digits as its factorization.

669606912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 669606912 is about 25876.7639398747. The cubic root of 669606912 is about 874.8628517561.

The spelling of 669606912 in words is "six hundred sixty-nine million, six hundred six thousand, nine hundred twelve".