16656480 has 144 divisors (see below), whose sum is σ = 58378320. Its totient is φ = 4322304.

The previous prime is 16656463. The next prime is 16656533. The reversal of 16656480 is 8465661.

16656480 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 648 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×16656480³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 61786 + ... + 62054.

It is an arithmetic number, because the mean of its divisors is an integer number (405405).

Almost surely, 2^16656480 is an apocalyptic number.

16656480 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 16656480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29189160).

16656480 is an abundant number, since it is smaller than the sum of its proper divisors (41721840).

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

16656480 is a wasteful number, since it uses less digits than its factorization.

16656480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 16656480 is about 4081.2351071704. The cubic root of 16656480 is about 255.3844259334.

The spelling of 16656480 in words is "sixteen million, six hundred fifty-six thousand, four hundred eighty".