1664505004 has 12 divisors (see below), whose sum is σ = 2925947584. Its totient is φ = 828519984.

The previous prime is 1664504999. The next prime is 1664505067. The reversal of 1664505004 is 4005054661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932127 + ... + 933910.

Almost surely, 2^1664505004 is an apocalyptic number.

It is an amenable number.

1664505004 is a deficient number, since it is larger than the sum of its proper divisors (1261442580).

1664505004 is a wasteful number, since it uses less digits than its factorization.

1664505004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866264 (or 1866262 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1664505004 is about 40798.3456037129. The cubic root of 1664505004 is about 1185.1182928312.

Adding to 1664505004 its reverse (4005054661), we get a palindrome (5669559665).

The spelling of 1664505004 in words is "one billion, six hundred sixty-four million, five hundred five thousand, four".