65624641 has 8 divisors (see below), whose sum is σ = 71180424. Its totient is φ = 60257280.

The previous prime is 65624623. The next prime is 65624677. The reversal of 65624641 is 14642656.

65624641 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 2755600 + 62869041 = 1660^2 + 7929^2 .

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 65624641 - 2¹¹ = 65622593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65624597 and 65624606.

It is not an unprimeable number, because it can be changed into a prime (65624621) 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, 46380 + ... + 47773.

It is an arithmetic number, because the mean of its divisors is an integer number (8897553).

Almost surely, 2^65624641 is an apocalyptic number.

It is an amenable number.

65624641 is a deficient number, since it is larger than the sum of its proper divisors (5555783).

65624641 is a wasteful number, since it uses less digits than its factorization.

65624641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94211.

The product of its digits is 34560, while the sum is 34.

The square root of 65624641 is about 8100.9037150185. The cubic root of 65624641 is about 403.3564259862.

The spelling of 65624641 in words is "sixty-five million, six hundred twenty-four thousand, six hundred forty-one".