1664384566 has 8 divisors (see below), whose sum is σ = 2688621264. Its totient is φ = 768177480.

The previous prime is 1664384563. The next prime is 1664384567. The reversal of 1664384566 is 6654834661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664384563) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 32007370 + ... + 32007421.

It is an arithmetic number, because the mean of its divisors is an integer number (336077658).

Almost surely, 2^1664384566 is an apocalyptic number.

1664384566 is a deficient number, since it is larger than the sum of its proper divisors (1024236698).

1664384566 is a wasteful number, since it uses less digits than its factorization.

1664384566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64014806.

The product of its digits is 2488320, while the sum is 49.

The square root of 1664384566 is about 40796.8695612788. The cubic root of 1664384566 is about 1185.0897084133.

The spelling of 1664384566 in words is "one billion, six hundred sixty-four million, three hundred eighty-four thousand, five hundred sixty-six".