664005326 has 8 divisors (see below), whose sum is σ = 1007199360. Its totient is φ = 328272208.

The previous prime is 664005317. The next prime is 664005341. The reversal of 664005326 is 623500466.

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

It is a junction number, because it is equal to n+sod(n) for n = 664005292 and 664005301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1865006 + ... + 1865361.

It is an arithmetic number, because the mean of its divisors is an integer number (125899920).

Almost surely, 2^664005326 is an apocalyptic number.

664005326 is a deficient number, since it is larger than the sum of its proper divisors (343194034).

664005326 is a wasteful number, since it uses less digits than its factorization.

664005326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730458.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 664005326 is about 25768.3007976855. The cubic root of 664005326 is about 872.4164668538.

The spelling of 664005326 in words is "six hundred sixty-four million, five thousand, three hundred twenty-six".