16662156 has 72 divisors (see below), whose sum is σ = 46347840. Its totient is φ = 4642848.

The previous prime is 16662103. The next prime is 16662157. The reversal of 16662156 is 65126661.

It is not an unprimeable number, because it can be changed into a prime (16662157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24955 + ... + 25613.

It is an arithmetic number, because the mean of its divisors is an integer number (643720).

Almost surely, 2^16662156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16662156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23173920).

16662156 is an abundant number, since it is smaller than the sum of its proper divisors (29685684).

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

16662156 is a wasteful number, since it uses less digits than its factorization.

16662156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 714 counting only the distinct ones).

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

The square root of 16662156 is about 4081.9304256687. The cubic root of 16662156 is about 255.4134316093.

The spelling of 16662156 in words is "sixteen million, six hundred sixty-two thousand, one hundred fifty-six".