65679544013 has 8 divisors (see below), whose sum is σ = 70495692408. Its totient is φ = 60969245184.

The previous prime is 65679544009. The next prime is 65679544019. The reversal of 65679544013 is 31044597656.

It can be written as a sum of positive squares in 4 ways, for example, as 19752053764 + 45927490249 = 140542^2 + 214307^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 65679544013 - 2² = 65679544009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65679544019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26461106 + ... + 26463587.

It is an arithmetic number, because the mean of its divisors is an integer number (8811961551).

Almost surely, 2^65679544013 is an apocalyptic number.

It is an amenable number.

65679544013 is a deficient number, since it is larger than the sum of its proper divisors (4816148395).

65679544013 is a wasteful number, since it uses less digits than its factorization.

65679544013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52924783.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 65679544013 in words is "sixty-five billion, six hundred seventy-nine million, five hundred forty-four thousand, thirteen".