664232605 has 8 divisors (see below), whose sum is σ = 799378272. Its totient is φ = 529853328.

The previous prime is 664232603. The next prime is 664232627. The reversal of 664232605 is 506232466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664232605 - 2¹ = 664232603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664232603) 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 7 ways as a sum of consecutive naturals, for example, 189687 + ... + 193156.

It is an arithmetic number, because the mean of its divisors is an integer number (99922284).

Almost surely, 2^664232605 is an apocalyptic number.

It is an amenable number.

664232605 is a deficient number, since it is larger than the sum of its proper divisors (135145667).

664232605 is a wasteful number, since it uses less digits than its factorization.

664232605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383195.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 664232605 is about 25772.7104705733. The cubic root of 664232605 is about 872.5159938284.

The spelling of 664232605 in words is "six hundred sixty-four million, two hundred thirty-two thousand, six hundred five".