66105103501 has 2 divisors, whose sum is σ = 66105103502. Its totient is φ = 66105103500.

The previous prime is 66105103433. The next prime is 66105103511. The reversal of 66105103501 is 10530150166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60855956100 + 5249147401 = 246690^2 + 72451^2 .

It is a cyclic number.

It is not a de Polignac number, because 66105103501 - 2³⁵ = 31745365133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66105103501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105103511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052551750 + 33052551751.

It is an arithmetic number, because the mean of its divisors is an integer number (33052551751).

Almost surely, 2^66105103501 is an apocalyptic number.

It is an amenable number.

66105103501 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105103501 is an equidigital number, since it uses as much as digits as its factorization.

66105103501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 66105103501 its reverse (10530150166), we get a palindrome (76635253667).

The spelling of 66105103501 in words is "sixty-six billion, one hundred five million, one hundred three thousand, five hundred one".