664374326 has 16 divisors (see below), whose sum is σ = 1242466560. Its totient is φ = 258847080.

The previous prime is 664374323. The next prime is 664374367. The reversal of 664374326 is 623473466.

664374326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664374323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156906 + ... + 2157213.

It is an arithmetic number, because the mean of its divisors is an integer number (77654160).

Almost surely, 2^664374326 is an apocalyptic number.

664374326 is a deficient number, since it is larger than the sum of its proper divisors (578092234).

664374326 is a wasteful number, since it uses less digits than its factorization.

664374326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4314139.

The product of its digits is 435456, while the sum is 41.

The square root of 664374326 is about 25775.4597631158. The cubic root of 664374326 is about 872.5780428982.

The spelling of 664374326 in words is "six hundred sixty-four million, three hundred seventy-four thousand, three hundred twenty-six".