66027565 has 16 divisors (see below), whose sum is σ = 83603520. Its totient is φ = 49921920.

The previous prime is 66027557. The next prime is 66027569. The reversal of 66027565 is 56572066.

It is not a de Polignac number, because 66027565 - 2³ = 66027557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66027569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76617 + ... + 77473.

It is an arithmetic number, because the mean of its divisors is an integer number (5225220).

Almost surely, 2^66027565 is an apocalyptic number.

It is an amenable number.

66027565 is a deficient number, since it is larger than the sum of its proper divisors (17575955).

66027565 is a wasteful number, since it uses less digits than its factorization.

66027565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 66027565 is about 8125.7347360100. The cubic root of 66027565 is about 404.1802552321.

The spelling of 66027565 in words is "sixty-six million, twenty-seven thousand, five hundred sixty-five".