Subtracting 1662 from its reverse (2661), we obtain a palindrome (999).
1662 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
1662 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 9, base 13 and base 16.
It is a nialpdrome in base 12.
It is a congruent number.
1662 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.
1662 is a wasteful number, since it uses less digits than its factorization.
1662 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 282.
The square root of 1662 is about 40.7676342213. The cubic root of 1662 is about 11.8452347804.
The spelling of 1662 in words is "one thousand, six hundred sixty-two".