1664315466 has 96 divisors (see below), whose sum is σ = 3853870272. Its totient is φ = 475073280.

The previous prime is 1664315447. The next prime is 1664315467. The reversal of 1664315466 is 6645134661.

It is not an unprimeable number, because it can be changed into a prime (1664315467) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2548396 + ... + 2549048.

It is an arithmetic number, because the mean of its divisors is an integer number (40144482).

Almost surely, 2^1664315466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664315466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926935136).

1664315466 is an abundant number, since it is smaller than the sum of its proper divisors (2189554806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664315466 is a wasteful number, since it uses less digits than its factorization.

1664315466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 765 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 1664315466 is about 40796.0226737852. The cubic root of 1664315466 is about 1185.0733077902.

The spelling of 1664315466 in words is "one billion, six hundred sixty-four million, three hundred fifteen thousand, four hundred sixty-six".