65986280761559 has 2 divisors, whose sum is σ = 65986280761560. Its totient is φ = 65986280761558.

The previous prime is 65986280761553. The next prime is 65986280761657. The reversal of 65986280761559 is 95516708268956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65986280761559 - 2³⁶ = 65917561284823 is a prime.

It is a super-2 number, since 2×65986280761559² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65986280761559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65986280761553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993140380779 + 32993140380780.

It is an arithmetic number, because the mean of its divisors is an integer number (32993140380780).

Almost surely, 2^{65986280761559} is an apocalyptic number.

65986280761559 is a deficient number, since it is larger than the sum of its proper divisors (1).

65986280761559 is an equidigital number, since it uses as much as digits as its factorization.

65986280761559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552000, while the sum is 77.

Adding to 65986280761559 its sum of digits (77), we get a square (65986280761636 = 8123194²).

The spelling of 65986280761559 in words is "sixty-five trillion, nine hundred eighty-six billion, two hundred eighty million, seven hundred sixty-one thousand, five hundred fifty-nine".