668663702 has 24 divisors (see below), whose sum is σ = 1168009344. Its totient is φ = 286260912.

The previous prime is 668663683. The next prime is 668663719. The reversal of 668663702 is 207366866.

It is a super-2 number, since 2×668663702² = 894222292744689608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103388 + ... + 109664.

It is an arithmetic number, because the mean of its divisors is an integer number (48667056).

Almost surely, 2^668663702 is an apocalyptic number.

668663702 is a deficient number, since it is larger than the sum of its proper divisors (499345642).

668663702 is a wasteful number, since it uses less digits than its factorization.

668663702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380 (or 7373 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 668663702 is about 25858.5324796285. The cubic root of 668663702 is about 874.4518807177.

The spelling of 668663702 in words is "six hundred sixty-eight million, six hundred sixty-three thousand, seven hundred two".