65580339081 has 4 divisors (see below), whose sum is σ = 87440452112. Its totient is φ = 43720226052.

The previous prime is 65580339073. The next prime is 65580339091. The reversal of 65580339081 is 18093308556.

65580339081 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 not a de Polignac number, because 65580339081 - 2³ = 65580339073 is a prime.

It is a super-2 number, since 2×65580339081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65580339081.

It is not an unprimeable number, because it can be changed into a prime (65580339091) 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, 10930056511 + ... + 10930056516.

It is an arithmetic number, because the mean of its divisors is an integer number (21860113028).

Almost surely, 2^65580339081 is an apocalyptic number.

It is an amenable number.

65580339081 is a deficient number, since it is larger than the sum of its proper divisors (21860113031).

65580339081 is a wasteful number, since it uses less digits than its factorization.

65580339081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21860113030.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 65580339081 in words is "sixty-five billion, five hundred eighty million, three hundred thirty-nine thousand, eighty-one".