664448466 has 32 divisors (see below), whose sum is σ = 1457741376. Its totient is φ = 200232000.

The previous prime is 664448453. The next prime is 664448467. The reversal of 664448466 is 664844466.

It is not an unprimeable number, because it can be changed into a prime (664448467) 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 15 ways as a sum of consecutive naturals, for example, 15865 + ... + 39756.

It is an arithmetic number, because the mean of its divisors is an integer number (45554418).

Almost surely, 2^664448466 is an apocalyptic number.

664448466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

664448466 is an abundant number, since it is smaller than the sum of its proper divisors (793292910).

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

664448466 is a wasteful number, since it uses less digits than its factorization.

664448466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55818.

The product of its digits is 2654208, while the sum is 48.

The square root of 664448466 is about 25776.8979126659. The cubic root of 664448466 is about 872.6104997664.

The spelling of 664448466 in words is "six hundred sixty-four million, four hundred forty-eight thousand, four hundred sixty-six".