65365565 has 8 divisors (see below), whose sum is σ = 81143640. Its totient is φ = 50489152.

The previous prime is 65365541. The next prime is 65365583. The reversal of 65365565 is 56556356.

It can be written as a sum of positive squares in 4 ways, for example, as 9504889 + 55860676 = 3083^2 + 7474^2 .

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 65365565 - 2⁶ = 65365501 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225254 + ... + 225543.

It is an arithmetic number, because the mean of its divisors is an integer number (10142955).

Almost surely, 2^65365565 is an apocalyptic number.

It is an amenable number.

65365565 is a deficient number, since it is larger than the sum of its proper divisors (15778075).

65365565 is a wasteful number, since it uses less digits than its factorization.

65365565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450831.

The product of its digits is 405000, while the sum is 41.

The square root of 65365565 is about 8084.8973401027. The cubic root of 65365565 is about 402.8249295501.

The spelling of 65365565 in words is "sixty-five million, three hundred sixty-five thousand, five hundred sixty-five".