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1662 = 23277

1662 has 8 divisors (see below), whose sum is σ = 3336. Its totient is φ = 552.

The previous prime is 1657. The next prime is 1663. The reversal of 1662 is 2661.

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.

It is not an unprimeable number, because it can be changed into a prime (1663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133 + ... + 144.

It is an arithmetic number, because the mean of its divisors is an integer number (417).

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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1668).

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 product of its digits is 72, while the sum is 15.

The square root of 1662 is about 40.7676342213. The cubic root of 1662 is about 11.8452347804.

Subtracting 1662 from its reverse (2661), we obtain a palindrome (999).

It can be divided in two parts, 16 and 62, that added together give a triangular number (78 = T12).

The spelling of 1662 in words is "one thousand, six hundred sixty-two".

Divisors: 1 2 3 6 277 554 831 1662