669247944 has 64 divisors (see below), whose sum is σ = 1764768000. Its totient is φ = 210911040.

The previous prime is 669247937. The next prime is 669247949. The reversal of 669247944 is 449742966.

It is not an unprimeable number, because it can be changed into a prime (669247949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281079 + ... + 283449.

It is an arithmetic number, because the mean of its divisors is an integer number (27574500).

Almost surely, 2^669247944 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 669247944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882384000).

669247944 is an abundant number, since it is smaller than the sum of its proper divisors (1095520056).

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

669247944 is a wasteful number, since it uses less digits than its factorization.

669247944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018 (or 3014 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 669247944 is about 25869.8269031704. The cubic root of 669247944 is about 874.7064894196.

The spelling of 669247944 in words is "six hundred sixty-nine million, two hundred forty-seven thousand, nine hundred forty-four".