1664803204 has 27 divisors (see below), whose sum is σ = 3049020247. Its totient is φ = 795312584.

The previous prime is 1664803201. The next prime is 1664803213. The reversal of 1664803204 is 4023084661.

The square root of 1664803204 is 40802.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1664803204.

It is not an unprimeable number, because it can be changed into a prime (1664803201) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1876449 + ... + 1877335.

Almost surely, 2^1664803204 is an apocalyptic number.

1664803204 is the 40802-nd square number.

It is an amenable number.

1664803204 is a deficient number, since it is larger than the sum of its proper divisors (1384217043).

1664803204 is an frugal number, since it uses more digits than its factorization.

1664803204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The cubic root of 1664803204 is about 1185.1890608517.

Adding to 1664803204 its reverse (4023084661), we get a palindrome (5687887865).

The spelling of 1664803204 in words is "one billion, six hundred sixty-four million, eight hundred three thousand, two hundred four".