1661332 has 12 divisors (see below), whose sum is σ = 2951200. Its totient is φ = 818136.

The previous prime is 1661327. The next prime is 1661333. The reversal of 1661332 is 2331661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661333) 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, 2832 + ... + 3367.

2^1661332 is an apocalyptic number.

It is an amenable number.

1661332 is a deficient number, since it is larger than the sum of its proper divisors (1289868).

1661332 is a wasteful number, since it uses less digits than its factorization.

1661332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270 (or 6268 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

The square root of 1661332 is about 1288.9266852696. The cubic root of 1661332 is about 118.4364760089.

Adding to 1661332 its reverse (2331661), we get a palindrome (3992993).

The spelling of 1661332 in words is "one million, six hundred sixty-one thousand, three hundred thirty-two".