16664120 has 64 divisors (see below), whose sum is σ = 41372640. Its totient is φ = 6040320.

The previous prime is 16664119. The next prime is 16664129. The reversal of 16664120 is 2146661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16664120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664129) 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 15 ways as a sum of consecutive naturals, for example, 53084 + ... + 53396.

Almost surely, 2^16664120 is an apocalyptic number.

16664120 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 16664120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20686320).

16664120 is an abundant number, since it is smaller than the sum of its proper divisors (24708520).

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

16664120 is a wasteful number, since it uses less digits than its factorization.

16664120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16664120 is about 4082.1709910292. The cubic root of 16664120 is about 255.4234665706.

It can be divided in two parts, 166641 and 20, that added together give a palindrome (166661).

The spelling of 16664120 in words is "sixteen million, six hundred sixty-four thousand, one hundred twenty".