16656216 has 32 divisors (see below), whose sum is σ = 42768240. Its totient is φ = 5401728.

The previous prime is 16656203. The next prime is 16656223. The reversal of 16656216 is 61265661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8491 + ... + 10266.

Almost surely, 2^16656216 is an apocalyptic number.

It is an amenable number.

16656216 is an abundant number, since it is smaller than the sum of its proper divisors (26112024).

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

16656216 is a wasteful number, since it uses less digits than its factorization.

16656216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803 (or 18799 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 16656216 is about 4081.2027638920. The cubic root of 16656216 is about 255.3830766719.

The spelling of 16656216 in words is "sixteen million, six hundred fifty-six thousand, two hundred sixteen".