1668479216 has 20 divisors (see below), whose sum is σ = 3234800400. Its totient is φ = 833692032.

The previous prime is 1668479201. The next prime is 1668479233. The reversal of 1668479216 is 6129748661.

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, 8501 + ... + 58388.

It is an arithmetic number, because the mean of its divisors is an integer number (161740020).

Almost surely, 2^1668479216 is an apocalyptic number.

1668479216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1668479216 is a deficient number, since it is larger than the sum of its proper divisors (1566321184).

1668479216 is a wasteful number, since it uses less digits than its factorization.

1668479216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68456 (or 68450 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The square root of 1668479216 is about 40847.0221191215. The cubic root of 1668479216 is about 1186.0607487555.

The spelling of 1668479216 in words is "one billion, six hundred sixty-eight million, four hundred seventy-nine thousand, two hundred sixteen".