64660585 has 12 divisors (see below), whose sum is σ = 85288644. Its totient is φ = 47025440.

The previous prime is 64660577. The next prime is 64660601. The reversal of 64660585 is 58506646.

It can be written as a sum of positive squares in 2 ways, for example, as 34892649 + 29767936 = 5907^2 + 5456^2 .

It is not a de Polignac number, because 64660585 - 2³ = 64660577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52834 + ... + 54043.

It is an arithmetic number, because the mean of its divisors is an integer number (7107387).

Almost surely, 2^64660585 is an apocalyptic number.

It is an amenable number.

64660585 is a deficient number, since it is larger than the sum of its proper divisors (20628059).

64660585 is a wasteful number, since it uses less digits than its factorization.

64660585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106904 (or 106893 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 64660585 is about 8041.1805725279. The cubic root of 64660585 is about 401.3715107708.

The spelling of 64660585 in words is "sixty-four million, six hundred sixty thousand, five hundred eighty-five".