668622682 has 32 divisors (see below), whose sum is σ = 1306996992. Its totient is φ = 248949504.

The previous prime is 668622659. The next prime is 668622697. The reversal of 668622682 is 286226866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104958 + ... + 111145.

It is an arithmetic number, because the mean of its divisors is an integer number (40843656).

Almost surely, 2^668622682 is an apocalyptic number.

668622682 is a deficient number, since it is larger than the sum of its proper divisors (638374310).

668622682 is a wasteful number, since it uses less digits than its factorization.

668622682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216142.

The product of its digits is 663552, while the sum is 46.

The square root of 668622682 is about 25857.7393056702. The cubic root of 668622682 is about 874.4339989088.

The spelling of 668622682 in words is "six hundred sixty-eight million, six hundred twenty-two thousand, six hundred eighty-two".