668824626 has 32 divisors (see below), whose sum is σ = 1362987648. Its totient is φ = 218758400.

The previous prime is 668824621. The next prime is 668824627. The reversal of 668824626 is 626428866.

It is not an unprimeable number, because it can be changed into a prime (668824621) 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, 63595 + ... + 73361.

It is an arithmetic number, because the mean of its divisors is an integer number (42593364).

Almost surely, 2^668824626 is an apocalyptic number.

668824626 is an abundant number, since it is smaller than the sum of its proper divisors (694163022).

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

668824626 is a wasteful number, since it uses less digits than its factorization.

668824626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9986.

The product of its digits is 1327104, while the sum is 48.

The square root of 668824626 is about 25861.6439152657. The cubic root of 668824626 is about 874.5220251001.

The spelling of 668824626 in words is "six hundred sixty-eight million, eight hundred twenty-four thousand, six hundred twenty-six".