65679544009 has 2 divisors, whose sum is σ = 65679544010. Its totient is φ = 65679544008.

The previous prime is 65679544003. The next prime is 65679544019. The reversal of 65679544009 is 90044597656.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65521664784 + 157879225 = 255972^2 + 12565^2 .

It is a cyclic number.

It is not a de Polignac number, because 65679544009 - 2²³ = 65671155401 is a prime.

It is not a weakly prime, because it can be changed into another prime (65679544003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32839772004 + 32839772005.

It is an arithmetic number, because the mean of its divisors is an integer number (32839772005).

Almost surely, 2^65679544009 is an apocalyptic number.

It is an amenable number.

65679544009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65679544009 is an equidigital number, since it uses as much as digits as its factorization.

65679544009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 65679544009 in words is "sixty-five billion, six hundred seventy-nine million, five hundred forty-four thousand, nine".