664055323 has 2 divisors, whose sum is σ = 664055324. Its totient is φ = 664055322.

The previous prime is 664055297. The next prime is 664055341. The reversal of 664055323 is 323550466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664055323 is a prime.

It is not a weakly prime, because it can be changed into another prime (664055723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332027661 + 332027662.

It is an arithmetic number, because the mean of its divisors is an integer number (332027662).

Almost surely, 2^664055323 is an apocalyptic number.

664055323 is a deficient number, since it is larger than the sum of its proper divisors (1).

664055323 is an equidigital number, since it uses as much as digits as its factorization.

664055323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 664055323 is about 25769.2709054797. The cubic root of 664055323 is about 872.4383628185.

The spelling of 664055323 in words is "six hundred sixty-four million, fifty-five thousand, three hundred twenty-three".