65543250665 has 8 divisors (see below), whose sum is σ = 78989464008. Its totient is φ = 52209558400.

The previous prime is 65543250623. The next prime is 65543250709. The reversal of 65543250665 is 56605234556.

It can be written as a sum of positive squares in 4 ways, for example, as 523860544 + 65019390121 = 22888^2 + 254989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65543250665 - 2²⁸ = 65274815209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28128986 + ... + 28131315.

It is an arithmetic number, because the mean of its divisors is an integer number (9873683001).

Almost surely, 2^65543250665 is an apocalyptic number.

It is an amenable number.

65543250665 is a deficient number, since it is larger than the sum of its proper divisors (13446213343).

65543250665 is a wasteful number, since it uses less digits than its factorization.

65543250665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56260539.

The product of its (nonzero) digits is 3240000, while the sum is 47.

The spelling of 65543250665 in words is "sixty-five billion, five hundred forty-three million, two hundred fifty thousand, six hundred sixty-five".