668429316 has 81 divisors (see below), whose sum is σ = 1758554343. Its totient is φ = 214071120.

The previous prime is 668429257. The next prime is 668429317. The reversal of 668429316 is 613924866.

The square root of 668429316 is 25854.

It is a perfect power (a square), and thus also a powerful number.

668429316 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 (668429317) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4808775 + ... + 4808913.

Almost surely, 2^668429316 is an apocalyptic number.

668429316 is the 25854-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668429316

668429316 is an abundant number, since it is smaller than the sum of its proper divisors (1090125027).

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

668429316 is a wasteful number, since it uses less digits than its factorization.

668429316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 175 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The cubic root of 668429316 is about 874.3496952042.

The spelling of 668429316 in words is "six hundred sixty-eight million, four hundred twenty-nine thousand, three hundred sixteen".