16611868 has 48 divisors (see below), whose sum is σ = 36578304. Its totient is φ = 6425280.

The previous prime is 16611851. The next prime is 16611899. The reversal of 16611868 is 86811661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16623 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (762048).

Almost surely, 2^16611868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16611868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18289152).

16611868 is an abundant number, since it is smaller than the sum of its proper divisors (19966436).

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

16611868 is a wasteful number, since it uses less digits than its factorization.

16611868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042 (or 1040 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 16611868 is about 4075.7659402866. The cubic root of 16611868 is about 255.1562185157.

The spelling of 16611868 in words is "sixteen million, six hundred eleven thousand, eight hundred sixty-eight".