1668628674 has 40 divisors (see below), whose sum is σ = 3825932880. Its totient is φ = 543272184.

The previous prime is 1668628667. The next prime is 1668628711. The reversal of 1668628674 is 4768268661.

1668628674 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 628 + 6 + 7 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1668628674.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112804 + ... + 126735.

It is an arithmetic number, because the mean of its divisors is an integer number (95648322).

Almost surely, 2^1668628674 is an apocalyptic number.

1668628674 is an abundant number, since it is smaller than the sum of its proper divisors (2157304206).

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

1668628674 is a wasteful number, since it uses less digits than its factorization.

1668628674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239596 (or 239587 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 1668628674 is about 40848.8515628041. The cubic root of 1668628674 is about 1186.0961624370.

The spelling of 1668628674 in words is "one billion, six hundred sixty-eight million, six hundred twenty-eight thousand, six hundred seventy-four".