6565165427 has 4 divisors (see below), whose sum is σ = 6565379400. Its totient is φ = 6564951456.

The previous prime is 6565165403. The next prime is 6565165441. The reversal of 6565165427 is 7245615656.

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

It is a cyclic number.

It is not a de Polignac number, because 6565165427 - 2¹⁸ = 6564903283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6565165127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51302 + ... + 125547.

It is an arithmetic number, because the mean of its divisors is an integer number (1641344850).

Almost surely, 2^6565165427 is an apocalyptic number.

6565165427 is a deficient number, since it is larger than the sum of its proper divisors (213973).

6565165427 is a wasteful number, since it uses less digits than its factorization.

6565165427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213972.

The product of its digits is 1512000, while the sum is 47.

The square root of 6565165427 is about 81025.7084325710. The cubic root of 6565165427 is about 1872.4715360530.

The spelling of 6565165427 in words is "six billion, five hundred sixty-five million, one hundred sixty-five thousand, four hundred twenty-seven".