1664476804 has 9 divisors (see below), whose sum is σ = 2912977207. Its totient is φ = 832197604.

The previous prime is 1664476747. The next prime is 1664476867. The reversal of 1664476804 is 4086744661.

The square root of 1664476804 is 40798.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 71397 + ... + 91795.

Almost surely, 2^1664476804 is an apocalyptic number.

1664476804 is the 40798-th square number.

It is an amenable number.

1664476804 is a deficient number, since it is larger than the sum of its proper divisors (1248500403).

1664476804 is an frugal number, since it uses more digits than its factorization.

1664476804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40802 (or 20401 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The cubic root of 1664476804 is about 1185.1116000457. Note that the first 3 decimals are identical.

The spelling of 1664476804 in words is "one billion, six hundred sixty-four million, four hundred seventy-six thousand, eight hundred four".