668432682 has 32 divisors (see below), whose sum is σ = 1494538560. Its totient is φ = 221441040.

The previous prime is 668432671. The next prime is 668432683. The reversal of 668432682 is 286234866.

It is not an unprimeable number, because it can be changed into a prime (668432683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29169 + ... + 46772.

It is an arithmetic number, because the mean of its divisors is an integer number (46704330).

Almost surely, 2^668432682 is an apocalyptic number.

668432682 is an abundant number, since it is smaller than the sum of its proper divisors (826105878).

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

668432682 is a wasteful number, since it uses less digits than its factorization.

668432682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76115 (or 76109 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 668432682 is about 25854.0650962281. The cubic root of 668432682 is about 874.3511628518.

The spelling of 668432682 in words is "six hundred sixty-eight million, four hundred thirty-two thousand, six hundred eighty-two".