668309614 has 16 divisors (see below), whose sum is σ = 1176638688. Its totient is φ = 278677152.

The previous prime is 668309561. The next prime is 668309639. The reversal of 668309614 is 416903866.

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 7 ways as a sum of consecutive naturals, for example, 644569 + ... + 645604.

It is an arithmetic number, because the mean of its divisors is an integer number (73539918).

Almost surely, 2^668309614 is an apocalyptic number.

668309614 is a deficient number, since it is larger than the sum of its proper divisors (508329074).

668309614 is a wasteful number, since it uses less digits than its factorization.

668309614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290219.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 668309614 is about 25851.6849354157. The cubic root of 668309614 is about 874.2974993809.

The spelling of 668309614 in words is "six hundred sixty-eight million, three hundred nine thousand, six hundred fourteen".