16616000 has 112 divisors (see below), whose sum is σ = 43110912. Its totient is φ = 6336000.

The previous prime is 16615979. The next prime is 16616009. The reversal of 16616000 is 61661.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616009) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 247967 + ... + 248033.

Almost surely, 2^16616000 is an apocalyptic number.

16616000 is a gapful number since it is divisible by the number (10) 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 16616000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21555456).

16616000 is an abundant number, since it is smaller than the sum of its proper divisors (26494912).

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

16616000 is an equidigital number, since it uses as much as digits as its factorization.

16616000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 16616000 is about 4076.2728073572. The cubic root of 16616000 is about 255.1773724299.

Adding to 16616000 its reverse (61661), we get a palindrome (16677661).

The spelling of 16616000 in words is "sixteen million, six hundred sixteen thousand".