16656481 has 8 divisors (see below), whose sum is σ = 17747424. Its totient is φ = 15577920.

The previous prime is 16656463. The next prime is 16656533. The reversal of 16656481 is 18465661.

16656481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16656481 - 2⁵ = 16656449 is a prime.

It is a super-2 number, since 2×16656481² = 554876718606722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16656481.

It is not an unprimeable number, because it can be changed into a prime (16656421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235 + ... + 5776.

It is an arithmetic number, because the mean of its divisors is an integer number (2218428).

Almost surely, 2^16656481 is an apocalyptic number.

It is an amenable number.

16656481 is a deficient number, since it is larger than the sum of its proper divisors (1090943).

16656481 is a wasteful number, since it uses less digits than its factorization.

16656481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191.

The product of its digits is 34560, while the sum is 37.

The square root of 16656481 is about 4081.2352296823. The cubic root of 16656481 is about 255.3844310442.

The spelling of 16656481 in words is "sixteen million, six hundred fifty-six thousand, four hundred eighty-one".