16321266 has 48 divisors (see below), whose sum is σ = 40098240. Its totient is φ = 4756320.

The previous prime is 16321259. The next prime is 16321271. The reversal of 16321266 is 66212361.

16321266 is a `hidden beast` number, since 1 + 632 + 1 + 26 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2611 + ... + 6281.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^16321266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16321266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20049120).

16321266 is an abundant number, since it is smaller than the sum of its proper divisors (23776974).

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

16321266 is a wasteful number, since it uses less digits than its factorization.

16321266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711 (or 3708 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 16321266 is about 4039.9586631549. The cubic root of 16321266 is about 253.6595869660.

The spelling of 16321266 in words is "sixteen million, three hundred twenty-one thousand, two hundred sixty-six".