668873796 has 72 divisors (see below), whose sum is σ = 1675729440. Its totient is φ = 207563904.

The previous prime is 668873791. The next prime is 668873809. The reversal of 668873796 is 697378866.

668873796 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 (668873791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254280 + ... + 256896.

It is an arithmetic number, because the mean of its divisors is an integer number (23274020).

Almost surely, 2^668873796 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 668873796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (837864720).

668873796 is an abundant number, since it is smaller than the sum of its proper divisors (1006855644).

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

668873796 is a wasteful number, since it uses less digits than its factorization.

668873796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2700 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 60.

The square root of 668873796 is about 25862.5945334183. The cubic root of 668873796 is about 874.5434553288.

The spelling of 668873796 in words is "six hundred sixty-eight million, eight hundred seventy-three thousand, seven hundred ninety-six".