66105480839 has 2 divisors, whose sum is σ = 66105480840. Its totient is φ = 66105480838.

The previous prime is 66105480817. The next prime is 66105480853. The reversal of 66105480839 is 93808450166.

66105480839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66105480839 - 2²⁸ = 65837045383 is a prime.

It is a super-2 number, since 2×66105480839² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105480239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052740419 + 33052740420.

It is an arithmetic number, because the mean of its divisors is an integer number (33052740420).

Almost surely, 2^66105480839 is an apocalyptic number.

66105480839 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105480839 is an equidigital number, since it uses as much as digits as its factorization.

66105480839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 66105480839 in words is "sixty-six billion, one hundred five million, four hundred eighty thousand, eight hundred thirty-nine".