1668522416 has 30 divisors (see below), whose sum is σ = 3527795412. Its totient is φ = 758172960.

The previous prime is 1668522397. The next prime is 1668522431. The reversal of 1668522416 is 6142258661.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540365 + ... + 543443.

Almost surely, 2^1668522416 is an apocalyptic number.

1668522416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1668522416 is an abundant number, since it is smaller than the sum of its proper divisors (1859272996).

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

1668522416 is an frugal number, since it uses more digits than its factorization.

1668522416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6177 (or 3092 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 1668522416 is about 40847.5509180171. The cubic root of 1668522416 is about 1186.0709850996.

The spelling of 1668522416 in words is "one billion, six hundred sixty-eight million, five hundred twenty-two thousand, four hundred sixteen".