1668705052 has 12 divisors (see below), whose sum is σ = 3337410160. Its totient is φ = 715159296.

The previous prime is 1668705011. The next prime is 1668705079. The reversal of 1668705052 is 2505078661.

1668705052 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1668704996 and 1668705014.

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 3 ways as a sum of consecutive naturals, for example, 29798277 + ... + 29798332.

Almost surely, 2^1668705052 is an apocalyptic number.

It is an amenable number.

1668705052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1668705052 is a wasteful number, since it uses less digits than its factorization.

1668705052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59596620 (or 59596618 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1668705052 is about 40849.7864376302. The cubic root of 1668705052 is about 1186.1142591875.

The spelling of 1668705052 in words is "one billion, six hundred sixty-eight million, seven hundred five thousand, fifty-two".