65565457 has 4 divisors (see below), whose sum is σ = 65585700. Its totient is φ = 65545216.

The previous prime is 65565439. The next prime is 65565503. The reversal of 65565457 is 75456556.

65565457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 45279441 + 20286016 = 6729^2 + 4504^2 .

It is a 3-Lehmer number, since φ(65565457) divides (65565457-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65565457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65565407) 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 3 ways as a sum of consecutive naturals, for example, 4048 + ... + 12145.

It is an arithmetic number, because the mean of its divisors is an integer number (16396425).

It is a Poulet number, since it divides 2^65565456-1.

Almost surely, 2^65565457 is an apocalyptic number.

65565457 is the 4049-th decagonal number.

It is an amenable number.

65565457 is a deficient number, since it is larger than the sum of its proper divisors (20243).

65565457 is a wasteful number, since it uses less digits than its factorization.

65565457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20242.

The product of its digits is 630000, while the sum is 43.

The square root of 65565457 is about 8097.2499652660. The cubic root of 65565457 is about 403.2351329963.

The spelling of 65565457 in words is "sixty-five million, five hundred sixty-five thousand, four hundred fifty-seven".