65695565 has 16 divisors (see below), whose sum is σ = 89894448. Its totient is φ = 45659136.

The previous prime is 65695561. The next prime is 65695573. The reversal of 65695565 is 56559656.

It can be written as a sum of positive squares in 8 ways, for example, as 198916 + 65496649 = 446^2 + 8093^2 .

It is a cyclic number.

It is not a de Polignac number, because 65695565 - 2² = 65695561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65695561) 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 15 ways as a sum of consecutive naturals, for example, 28622 + ... + 30831.

It is an arithmetic number, because the mean of its divisors is an integer number (5618403).

Almost surely, 2^65695565 is an apocalyptic number.

65695565 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65695565 is a deficient number, since it is larger than the sum of its proper divisors (24198883).

65695565 is a wasteful number, since it uses less digits than its factorization.

65695565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59488.

The product of its digits is 1215000, while the sum is 47.

The square root of 65695565 is about 8105.2800691895. The cubic root of 65695565 is about 403.5016831689.

The spelling of 65695565 in words is "sixty-five million, six hundred ninety-five thousand, five hundred sixty-five".