664334329 has 4 divisors (see below), whose sum is σ = 664387984. Its totient is φ = 664280676.

The previous prime is 664334311. The next prime is 664334339. The reversal of 664334329 is 923433466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 923433466 = 2 ⋅461716733.

It is a cyclic number.

It is not a de Polignac number, because 664334329 - 2¹³ = 664326137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664334291 and 664334300.

It is not an unprimeable number, because it can be changed into a prime (664334339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254 + ... + 36520.

It is an arithmetic number, because the mean of its divisors is an integer number (166096996).

Almost surely, 2^664334329 is an apocalyptic number.

It is an amenable number.

664334329 is a deficient number, since it is larger than the sum of its proper divisors (53655).

664334329 is a wasteful number, since it uses less digits than its factorization.

664334329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53654.

The product of its digits is 279936, while the sum is 40.

The square root of 664334329 is about 25774.6838777898. The cubic root of 664334329 is about 872.5605320849.

The spelling of 664334329 in words is "six hundred sixty-four million, three hundred thirty-four thousand, three hundred twenty-nine".