16662 has 8 divisors (see below), whose sum is σ = 33336. Its totient is φ = 5552.

The previous prime is 16661. The next prime is 16673. The reversal of 16662 is 26661.

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

16662 is an admirable number.

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

It is a plaindrome in base 11 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383 + ... + 1394.

It is an arithmetic number, because the mean of its divisors is an integer number (4167).

2¹⁶⁶⁶² is an apocalyptic number.

16662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16668).

16662 is a wasteful number, since it uses less digits than its factorization.

16662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its digits is 432, while the sum is 21.

The square root of 16662 is about 129.0813696859. The cubic root of 16662 is about 25.5412634501.

Subtracting from 16662 its sum of digits (21), we obtain a square (16641 = 129²).

Subtracting 16662 from its reverse (26661), we obtain a palindrome (9999).

The spelling of 16662 in words is "sixteen thousand, six hundred sixty-two".