65752422721 has 4 divisors (see below), whose sum is σ = 66254349744. Its totient is φ = 65250495700.

The previous prime is 65752422719. The next prime is 65752422733. The reversal of 65752422721 is 12722425756.

65752422721 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, 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 65752422721 - 2¹ = 65752422719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65752422521) 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, 250963315 + ... + 250963576.

It is an arithmetic number, because the mean of its divisors is an integer number (16563587436).

Almost surely, 2^65752422721 is an apocalyptic number.

It is an amenable number.

65752422721 is a deficient number, since it is larger than the sum of its proper divisors (501927023).

65752422721 is a wasteful number, since it uses less digits than its factorization.

65752422721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501927022.

The product of its digits is 470400, while the sum is 43.

The spelling of 65752422721 in words is "sixty-five billion, seven hundred fifty-two million, four hundred twenty-two thousand, seven hundred twenty-one".