1664488664 has 16 divisors (see below), whose sum is σ = 3124012320. Its totient is φ = 831418720.

The previous prime is 1664488627. The next prime is 1664488667. The reversal of 1664488664 is 4668844661.

It is a super-3 number, since 3×1664488664³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664488667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94592 + ... + 110799.

It is an arithmetic number, because the mean of its divisors is an integer number (195250770).

Almost surely, 2^1664488664 is an apocalyptic number.

It is an amenable number.

1664488664 is a deficient number, since it is larger than the sum of its proper divisors (1459523656).

1664488664 is a wasteful number, since it uses less digits than its factorization.

1664488664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206410 (or 206406 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 53.

The square root of 1664488664 is about 40798.1453500034. The cubic root of 1664488664 is about 1185.1144148221.

The spelling of 1664488664 in words is "one billion, six hundred sixty-four million, four hundred eighty-eight thousand, six hundred sixty-four".