1664052904 has 8 divisors (see below), whose sum is σ = 3120099210. Its totient is φ = 832026448.

The previous prime is 1664052899. The next prime is 1664052917. The reversal of 1664052904 is 4092504661.

It can be written as a sum of positive squares in only one way, i.e., 1049112100 + 614940804 = 32390^2 + 24798^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1664052904³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104003299 + ... + 104003314.

Almost surely, 2^1664052904 is an apocalyptic number.

It is an amenable number.

1664052904 is a deficient number, since it is larger than the sum of its proper divisors (1456046306).

1664052904 is a wasteful number, since it uses less digits than its factorization.

1664052904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208006619 (or 208006615 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1664052904 is about 40792.8045615890. The cubic root of 1664052904 is about 1185.0109855545.

The spelling of 1664052904 in words is "one billion, six hundred sixty-four million, fifty-two thousand, nine hundred four".