1668930688 has 32 divisors (see below), whose sum is σ = 3334176000. Its totient is φ = 832118016.

The previous prime is 1668930667. The next prime is 1668930689. The reversal of 1668930688 is 8860398661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1668930689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27793 + ... + 64111.

It is an arithmetic number, because the mean of its divisors is an integer number (104193000).

Almost surely, 2^1668930688 is an apocalyptic number.

It is an amenable number.

1668930688 is a deficient number, since it is larger than the sum of its proper divisors (1665245312).

1668930688 is an equidigital number, since it uses as much as digits as its factorization.

1668930688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36692 (or 36680 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 1668930688 is about 40852.5481212617. The cubic root of 1668930688 is about 1186.1677174095.

The spelling of 1668930688 in words is "one billion, six hundred sixty-eight million, nine hundred thirty thousand, six hundred eighty-eight".