1668133696 has 56 divisors (see below), whose sum is σ = 3460821120. Its totient is φ = 796257792.

The previous prime is 1668133661. The next prime is 1668133703. The reversal of 1668133696 is 6963318661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219605 + ... + 1220971.

Almost surely, 2^1668133696 is an apocalyptic number.

1668133696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668133696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730410560).

1668133696 is an abundant number, since it is smaller than the sum of its proper divisors (1792687424).

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

1668133696 is a wasteful number, since it uses less digits than its factorization.

1668133696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231 (or 2221 counting only the distinct ones).

The product of its digits is 839808, while the sum is 49.

The square root of 1668133696 is about 40842.7924608492. The cubic root of 1668133696 is about 1185.9788706000.

The spelling of 1668133696 in words is "one billion, six hundred sixty-eight million, one hundred thirty-three thousand, six hundred ninety-six".