15998668 has 12 divisors (see below), whose sum is σ = 31997392. Its totient is φ = 6856560.

The previous prime is 15998663. The next prime is 15998669. The reversal of 15998668 is 86689951.

15998668 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (15998663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 285663 + ... + 285718.

Almost surely, 2^15998668 is an apocalyptic number.

It is an amenable number.

15998668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15998668 is a wasteful number, since it uses less digits than its factorization.

15998668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571392 (or 571390 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The square root of 15998668 is about 3999.8334965346. The cubic root of 15998668 is about 251.9772172231.

The spelling of 15998668 in words is "fifteen million, nine hundred ninety-eight thousand, six hundred sixty-eight".