66102030645601 has 2 divisors, whose sum is σ = 66102030645602. Its totient is φ = 66102030645600.

The previous prime is 66102030645527. The next prime is 66102030645611. The reversal of 66102030645601 is 10654603020166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35055292404001 + 31046738241600 = 5920751^2 + 5571960^2 .

It is a cyclic number.

It is not a de Polignac number, because 66102030645601 - 2⁷ = 66102030645473 is a prime.

It is not a weakly prime, because it can be changed into another prime (66102030645611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33051015322800 + 33051015322801.

It is an arithmetic number, because the mean of its divisors is an integer number (33051015322801).

Almost surely, 2^{66102030645601} is an apocalyptic number.

It is an amenable number.

66102030645601 is a deficient number, since it is larger than the sum of its proper divisors (1).

66102030645601 is an equidigital number, since it uses as much as digits as its factorization.

66102030645601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 66102030645601 its reverse (10654603020166), we get a palindrome (76756633665767).

The spelling of 66102030645601 in words is "sixty-six trillion, one hundred two billion, thirty million, six hundred forty-five thousand, six hundred one".