668552722 has 8 divisors (see below), whose sum is σ = 1024166016. Its totient is φ = 327164052.

The previous prime is 668552711. The next prime is 668552723. The reversal of 668552722 is 227255866.

668552722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (668552723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3556038 + ... + 3556225.

It is an arithmetic number, because the mean of its divisors is an integer number (128020752).

Almost surely, 2^668552722 is an apocalyptic number.

668552722 is a deficient number, since it is larger than the sum of its proper divisors (355613294).

668552722 is a wasteful number, since it uses less digits than its factorization.

668552722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112312.

The product of its digits is 403200, while the sum is 43.

The square root of 668552722 is about 25856.3864838071. The cubic root of 668552722 is about 874.4034996262.

The spelling of 668552722 in words is "six hundred sixty-eight million, five hundred fifty-two thousand, seven hundred twenty-two".