664465305 has 32 divisors (see below), whose sum is σ = 1215993600. Its totient is φ = 303512832.

The previous prime is 664465301. The next prime is 664465337. The reversal of 664465305 is 503564466.

It is not a de Polignac number, because 664465305 - 2² = 664465301 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (664465301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236851 + ... + 239639.

It is an arithmetic number, because the mean of its divisors is an integer number (37999800).

Almost surely, 2^664465305 is an apocalyptic number.

It is an amenable number.

664465305 is a deficient number, since it is larger than the sum of its proper divisors (551528295).

664465305 is a wasteful number, since it uses less digits than its factorization.

664465305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073.

The product of its (nonzero) digits is 259200, while the sum is 39.

The square root of 664465305 is about 25777.2245402797. The cubic root of 664465305 is about 872.6178711754.

The spelling of 664465305 in words is "six hundred sixty-four million, four hundred sixty-five thousand, three hundred five".