668526560 has 96 divisors (see below), whose sum is σ = 1759695840. Its totient is φ = 238307328.

The previous prime is 668526559. The next prime is 668526583. The reversal of 668526560 is 65625866.

It is a happy number.

It is a super-2 number, since 2×668526560² = 893855522850867200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 54779 + ... + 65861.

It is an arithmetic number, because the mean of its divisors is an integer number (18330165).

Almost surely, 2^668526560 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 668526560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879847920).

668526560 is an abundant number, since it is smaller than the sum of its proper divisors (1091169280).

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

668526560 is a wasteful number, since it uses less digits than its factorization.

668526560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140 (or 11132 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 668526560 is about 25855.8805690311. The cubic root of 668526560 is about 874.3920936732.

The spelling of 668526560 in words is "six hundred sixty-eight million, five hundred twenty-six thousand, five hundred sixty".