3201664 has 16 divisors (see below), whose sum is σ = 6378570. Its totient is φ = 1600768.

The previous prime is 3201643. The next prime is 3201689. The reversal of 3201664 is 4661023.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 1459264 = 1320^2 + 1208^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12379 + ... + 12634.

Almost surely, 2^3201664 is an apocalyptic number.

It is an amenable number.

3201664 is a deficient number, since it is larger than the sum of its proper divisors (3176906).

3201664 is an equidigital number, since it uses as much as digits as its factorization.

3201664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25027 (or 25015 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3201664 is about 1789.3194236916. The cubic root of 3201664 is about 147.3867981379.

Adding to 3201664 its reverse (4661023), we get a palindrome (7862687).

The spelling of 3201664 in words is "three million, two hundred one thousand, six hundred sixty-four".