664264605 has 16 divisors (see below), whose sum is σ = 1118761920. Its totient is φ = 335628288.

The previous prime is 664264597. The next prime is 664264619. The reversal of 664264605 is 506462466.

It is not a de Polignac number, because 664264605 - 2³ = 664264597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1165092 + ... + 1165661.

It is an arithmetic number, because the mean of its divisors is an integer number (69922620).

Almost surely, 2^664264605 is an apocalyptic number.

It is an amenable number.

664264605 is a deficient number, since it is larger than the sum of its proper divisors (454497315).

664264605 is a wasteful number, since it uses less digits than its factorization.

664264605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330780.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 664264605 is about 25773.3312747887. The cubic root of 664264605 is about 872.5300050162.

The spelling of 664264605 in words is "six hundred sixty-four million, two hundred sixty-four thousand, six hundred five".