668530926 has 96 divisors (see below), whose sum is σ = 1737635328. Its totient is φ = 181621440.

The previous prime is 668530909. The next prime is 668530931. The reversal of 668530926 is 629035866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 570321 + ... + 571491.

It is an arithmetic number, because the mean of its divisors is an integer number (18100368).

Almost surely, 2^668530926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668530926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868817664).

668530926 is an abundant number, since it is smaller than the sum of its proper divisors (1069104402).

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

668530926 is a wasteful number, since it uses less digits than its factorization.

668530926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 668530926 is about 25855.9649984293. The cubic root of 668530926 is about 874.3939971566.

The spelling of 668530926 in words is "six hundred sixty-eight million, five hundred thirty thousand, nine hundred twenty-six".