1066866908501 has 2 divisors, whose sum is σ = 1066866908502.
Its totient is φ = 1066866908500.
The previous prime is 1066866908479. The next prime is 1066866908509. The reversal of 1066866908501 is 1058096686601.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 764223891601 + 302643016900 = 874199^2 + 550130^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1066866908501 is a prime.
It is a super-2 number, since 2×10668669085012 (a number of 25 digits) contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1066866908509) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533433454250 + 533433454251.
It is an arithmetic number, because the mean of its divisors is an integer number (533433454251).
Almost surely, 21066866908501 is an apocalyptic number.
It is an amenable number.
1066866908501 is a deficient number, since it is larger than the sum of its proper divisors (1).
1066866908501 is an equidigital number, since it uses as much as digits as its factorization.
1066866908501 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 3732480, while the sum is 56.
The spelling of 1066866908501 in words is "one trillion, sixty-six billion, eight hundred sixty-six million, nine hundred eight thousand, five hundred one".