64067585 has 4 divisors (see below), whose sum is σ = 76881108. Its totient is φ = 51254064.

The previous prime is 64067579. The next prime is 64067593. The reversal of 64067585 is 58576046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39137536 + 24930049 = 6256^2 + 4993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64067585 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6406754 + ... + 6406763.

It is an arithmetic number, because the mean of its divisors is an integer number (19220277).

Almost surely, 2^64067585 is an apocalyptic number.

It is an amenable number.

64067585 is a deficient number, since it is larger than the sum of its proper divisors (12813523).

64067585 is a wasteful number, since it uses less digits than its factorization.

64067585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12813522.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 64067585 is about 8004.2229479194. Note that the first 3 decimals coincide. The cubic root of 64067585 is about 400.1407525493.

The spelling of 64067585 in words is "sixty-four million, sixty-seven thousand, five hundred eighty-five".