669901248 has 84 divisors (see below), whose sum is σ = 1925990560. Its totient is φ = 222621696.

The previous prime is 669901237. The next prime is 669901313. The reversal of 669901248 is 842109966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209808 + ... + 212976.

Almost surely, 2^669901248 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 669901248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962995280).

669901248 is an abundant number, since it is smaller than the sum of its proper divisors (1256089312).

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

669901248 is a wasteful number, since it uses less digits than its factorization.

669901248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554 (or 3541 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 669901248 is about 25882.4505794950. The cubic root of 669901248 is about 874.9910194452.

The spelling of 669901248 in words is "six hundred sixty-nine million, nine hundred one thousand, two hundred forty-eight".