664325243 has 12 divisors (see below), whose sum is σ = 694430880. Its totient is φ = 635445216.

The previous prime is 664325239. The next prime is 664325273. The reversal of 664325243 is 342523466.

It is not a de Polignac number, because 664325243 - 2² = 664325239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664325273) 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 11 ways as a sum of consecutive naturals, for example, 88046 + ... + 95292.

It is an arithmetic number, because the mean of its divisors is an integer number (57869240).

Almost surely, 2^664325243 is an apocalyptic number.

664325243 is a deficient number, since it is larger than the sum of its proper divisors (30105637).

664325243 is a wasteful number, since it uses less digits than its factorization.

664325243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414 (or 7385 counting only the distinct ones).

The product of its digits is 103680, while the sum is 35.

The square root of 664325243 is about 25774.5076189634. The cubic root of 664325243 is about 872.5565541074.

The spelling of 664325243 in words is "six hundred sixty-four million, three hundred twenty-five thousand, two hundred forty-three".