65413765 has 4 divisors (see below), whose sum is σ = 78496524. Its totient is φ = 52331008.

The previous prime is 65413757. The next prime is 65413769. The reversal of 65413765 is 56731456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52215076 + 13198689 = 7226^2 + 3633^2 .

It is a cyclic number.

It is not a de Polignac number, because 65413765 - 2³ = 65413757 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 (65413769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6541372 + ... + 6541381.

It is an arithmetic number, because the mean of its divisors is an integer number (19624131).

Almost surely, 2^65413765 is an apocalyptic number.

It is an amenable number.

65413765 is a deficient number, since it is larger than the sum of its proper divisors (13082759).

65413765 is a wasteful number, since it uses less digits than its factorization.

65413765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13082758.

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

The square root of 65413765 is about 8087.8776573338. The cubic root of 65413765 is about 402.9239184246.

The spelling of 65413765 in words is "sixty-five million, four hundred thirteen thousand, seven hundred sixty-five".