65747449 has 8 divisors (see below), whose sum is σ = 69702120. Its totient is φ = 61802496.

The previous prime is 65747443. The next prime is 65747453. The reversal of 65747449 is 94474756.

It can be written as a sum of positive squares in 4 ways, for example, as 5405625 + 60341824 = 2325^2 + 7768^2 .

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 65747449 - 2³ = 65747441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65747399 and 65747408.

It is not an unprimeable number, because it can be changed into a prime (65747441) 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, 15237 + ... + 19069.

It is an arithmetic number, because the mean of its divisors is an integer number (8712765).

Almost surely, 2^65747449 is an apocalyptic number.

It is an amenable number.

65747449 is a deficient number, since it is larger than the sum of its proper divisors (3954671).

65747449 is a wasteful number, since it uses less digits than its factorization.

65747449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859.

The product of its digits is 846720, while the sum is 46.

The square root of 65747449 is about 8108.4800671889. The cubic root of 65747449 is about 403.6078789344.

The spelling of 65747449 in words is "sixty-five million, seven hundred forty-seven thousand, four hundred forty-nine".