668902448 has 40 divisors (see below), whose sum is σ = 1372680000. Its totient is φ = 314881344.

The previous prime is 668902447. The next prime is 668902457. The reversal of 668902448 is 844209866.

668902448 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (668902447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42803 + ... + 56301.

It is an arithmetic number, because the mean of its divisors is an integer number (34317000).

Almost surely, 2^668902448 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 668902448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686340000).

668902448 is an abundant number, since it is smaller than the sum of its proper divisors (703777552).

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

668902448 is a wasteful number, since it uses less digits than its factorization.

668902448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13689 (or 13683 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 668902448 is about 25863.1484548962. The cubic root of 668902448 is about 874.5559425182. Note that the first 3 decimals are identical.

The spelling of 668902448 in words is "six hundred sixty-eight million, nine hundred two thousand, four hundred forty-eight".