605664505 has 8 divisors (see below), whose sum is σ = 744524424. Its totient is φ = 472713600.

The previous prime is 605664487. The next prime is 605664509. The reversal of 605664505 is 505466506.

605664505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16777216 + 588887289 = 4096^2 + 24267^2 .

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

It is not a de Polignac number, because 605664505 - 2¹¹ = 605662457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605664509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477026 + ... + 1477435.

It is an arithmetic number, because the mean of its divisors is an integer number (93065553).

Almost surely, 2^605664505 is an apocalyptic number.

It is an amenable number.

605664505 is a deficient number, since it is larger than the sum of its proper divisors (138859919).

605664505 is a wasteful number, since it uses less digits than its factorization.

605664505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954507.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 605664505 is about 24610.2520304039. The cubic root of 605664505 is about 846.0785941734.

The spelling of 605664505 in words is "six hundred five million, six hundred sixty-four thousand, five hundred five".