16601616 has 60 divisors (see below), whose sum is σ = 47973120. Its totient is φ = 5353920.

The previous prime is 16601609. The next prime is 16601623. The reversal of 16601616 is 61610661.

16601616 is nontrivially palindromic in base 11.

It is an interprime number because it is at equal distance from previous prime (16601609) and next prime (16601623).

It is a super-2 number, since 2×16601616² = 551227307622912, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16601616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2605 + ... + 6323.

It is an arithmetic number, because the mean of its divisors is an integer number (799552).

Almost surely, 2^16601616 is an apocalyptic number.

16601616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16601616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23986560).

16601616 is an abundant number, since it is smaller than the sum of its proper divisors (31371504).

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

16601616 is a wasteful number, since it uses less digits than its factorization.

16601616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3764 (or 3755 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 16601616 is about 4074.5080684667. The cubic root of 16601616 is about 255.1037179007.

The spelling of 16601616 in words is "sixteen million, six hundred one thousand, six hundred sixteen".