65257765 has 8 divisors (see below), whose sum is σ = 78535800. Its totient is φ = 52055232.

The previous prime is 65257763. The next prime is 65257771. The reversal of 65257765 is 56775256.

65257765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6796449 + 58461316 = 2607^2 + 7646^2 .

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 65257765 - 2¹ = 65257763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65257763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16954 + ... + 20443.

It is an arithmetic number, because the mean of its divisors is an integer number (9816975).

Almost surely, 2^65257765 is an apocalyptic number.

It is an amenable number.

65257765 is a deficient number, since it is larger than the sum of its proper divisors (13278035).

65257765 is a wasteful number, since it uses less digits than its factorization.

65257765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37751.

The product of its digits is 441000, while the sum is 43.

The square root of 65257765 is about 8078.2278378367. The cubic root of 65257765 is about 402.6033632406.

The spelling of 65257765 in words is "sixty-five million, two hundred fifty-seven thousand, seven hundred sixty-five".