668194302 has 16 divisors (see below), whose sum is σ = 1368983952.
Its totient is φ = 217298880.
The previous prime is 668194271. The next prime is 668194309. The reversal of 668194302 is 203491866.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (668194309) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1357873 + ... + 1358364.
It is an arithmetic number, because the mean of its divisors is an integer number (85561497).
Almost surely, 2668194302 is an apocalyptic number.
668194302 is an abundant number, since it is smaller than the sum of its proper divisors (700789650).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
668194302 is a wasteful number, since it uses less digits than its factorization.
668194302 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2716283.
The product of its (nonzero) digits is 62208, while the sum is 39.
The square root of 668194302 is about 25849.4545783852.
The cubic root of 668194302 is about 874.2472119143.
The spelling of 668194302 in words is "six hundred sixty-eight million, one hundred ninety-four thousand, three hundred two".