66585565 has 8 divisors (see below), whose sum is σ = 80650080. Its totient is φ = 52770192.

The previous prime is 66585559. The next prime is 66585569. The reversal of 66585565 is 56558566.

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 66585565 - 2⁹ = 66585053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66585569) 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, 61695 + ... + 62764.

It is an arithmetic number, because the mean of its divisors is an integer number (10081260).

Almost surely, 2^66585565 is an apocalyptic number.

It is an amenable number.

66585565 is a deficient number, since it is larger than the sum of its proper divisors (14064515).

66585565 is a wasteful number, since it uses less digits than its factorization.

66585565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124571.

The product of its digits is 1080000, while the sum is 46.

The square root of 66585565 is about 8159.9978553919. The cubic root of 66585565 is about 405.3156407442.

The spelling of 66585565 in words is "sixty-six million, five hundred eighty-five thousand, five hundred sixty-five".