65712329881 has 8 divisors (see below), whose sum is σ = 72756121824. Its totient is φ = 58846861920.

The previous prime is 65712329867. The next prime is 65712329897. The reversal of 65712329881 is 18892321756.

It is a happy number.

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

It is not a de Polignac number, because 65712329881 - 2²⁹ = 65175458969 is a prime.

It is a super-2 number, since 2×65712329881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65712320881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44580220 + ... + 44581693.

It is an arithmetic number, because the mean of its divisors is an integer number (9094515228).

Almost surely, 2^65712329881 is an apocalyptic number.

It is an amenable number.

65712329881 is a deficient number, since it is larger than the sum of its proper divisors (7043791943).

65712329881 is a wasteful number, since it uses less digits than its factorization.

65712329881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89161991.

The product of its digits is 1451520, while the sum is 52.

It can be divided in two parts, 65712 and 329881, that added together give a palindrome (395593).

The spelling of 65712329881 in words is "sixty-five billion, seven hundred twelve million, three hundred twenty-nine thousand, eight hundred eighty-one".