65744057971 has 4 divisors (see below), whose sum is σ = 65785123944. Its totient is φ = 65702992000.

The previous prime is 65744057933. The next prime is 65744058031. The reversal of 65744057971 is 17975044756.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65744057971 - 2²⁵ = 65710503539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65744052971) 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, 20530585 + ... + 20533786.

It is an arithmetic number, because the mean of its divisors is an integer number (16446280986).

Almost surely, 2^65744057971 is an apocalyptic number.

65744057971 is a deficient number, since it is larger than the sum of its proper divisors (41065973).

65744057971 is a wasteful number, since it uses less digits than its factorization.

65744057971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41065972.

The product of its (nonzero) digits is 7408800, while the sum is 55.

The spelling of 65744057971 in words is "sixty-five billion, seven hundred forty-four million, fifty-seven thousand, nine hundred seventy-one".