664323307 has 2 divisors, whose sum is σ = 664323308. Its totient is φ = 664323306.

The previous prime is 664323301. The next prime is 664323313. The reversal of 664323307 is 703323466.

It is a balanced prime because it is at equal distance from previous prime (664323301) and next prime (664323313).

It is a cyclic number.

It is not a de Polignac number, because 664323307 - 2²⁷ = 530105579 is a prime.

It is not a weakly prime, because it can be changed into another prime (664323301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332161653 + 332161654.

It is an arithmetic number, because the mean of its divisors is an integer number (332161654).

Almost surely, 2^664323307 is an apocalyptic number.

664323307 is a deficient number, since it is larger than the sum of its proper divisors (1).

664323307 is an equidigital number, since it uses as much as digits as its factorization.

664323307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 34.

The square root of 664323307 is about 25774.4700624475. The cubic root of 664323307 is about 872.5557064949. Note that the first 3 decimals are identical.

The spelling of 664323307 in words is "six hundred sixty-four million, three hundred twenty-three thousand, three hundred seven".