16656906 has 64 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 4362240.

The previous prime is 16656881. The next prime is 16656907. The reversal of 16656906 is 60965661.

16656906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16656907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28990 + ... + 29558.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^16656906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16656906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).

16656906 is an abundant number, since it is smaller than the sum of its proper divisors (24711414).

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

16656906 is a wasteful number, since it uses less digits than its factorization.

16656906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 16656906 is about 4081.2872969199. The cubic root of 16656906 is about 255.3866031209.

The spelling of 16656906 in words is "sixteen million, six hundred fifty-six thousand, nine hundred six".