65380565 has 8 divisors (see below), whose sum is σ = 78544728. Its totient is φ = 52245760.

The previous prime is 65380561. The next prime is 65380571. The reversal of 65380565 is 56508356.

It can be written as a sum of positive squares in 4 ways, for example, as 1012036 + 64368529 = 1006^2 + 8023^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65380565 - 2² = 65380561 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 (65380561) 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, 2096 + ... + 11625.

It is an arithmetic number, because the mean of its divisors is an integer number (9818091).

Almost surely, 2^65380565 is an apocalyptic number.

It is an amenable number.

65380565 is a deficient number, since it is larger than the sum of its proper divisors (13164163).

65380565 is a wasteful number, since it uses less digits than its factorization.

65380565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14679.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 65380565 is about 8085.8249424533. The cubic root of 65380565 is about 402.8557404305.

It can be divided in two parts, 653 and 80565, that added together give a palindrome (81218).

The spelling of 65380565 in words is "sixty-five million, three hundred eighty thousand, five hundred sixty-five".