65508641 has 4 divisors (see below), whose sum is σ = 71463984. Its totient is φ = 59553300.

The previous prime is 65508601. The next prime is 65508661. The reversal of 65508641 is 14680556.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65508641 - 2¹⁸ = 65246497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65508601) 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, 2977655 + ... + 2977676.

It is an arithmetic number, because the mean of its divisors is an integer number (17865996).

Almost surely, 2^65508641 is an apocalyptic number.

It is an amenable number.

65508641 is a deficient number, since it is larger than the sum of its proper divisors (5955343).

65508641 is a wasteful number, since it uses less digits than its factorization.

65508641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955342.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 65508641 is about 8093.7408532767. The cubic root of 65508641 is about 403.1186243488.

The spelling of 65508641 in words is "sixty-five million, five hundred eight thousand, six hundred forty-one".