1066505669 has 2 divisors, whose sum is σ = 1066505670. Its totient is φ = 1066505668.

The previous prime is 1066505641. The next prime is 1066505683. The reversal of 1066505669 is 9665056601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 902281444 + 164224225 = 30038^2 + 12815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066505669 - 2¹² = 1066501573 is a prime.

It is a super-2 number, since 2×1066505669² = 2274868684018275122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066505689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533252834 + 533252835.

It is an arithmetic number, because the mean of its divisors is an integer number (533252835).

Almost surely, 2^1066505669 is an apocalyptic number.

It is an amenable number.

1066505669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066505669 is an equidigital number, since it uses as much as digits as its factorization.

1066505669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 1066505669 is about 32657.3983807651. The cubic root of 1066505669 is about 1021.6945014255.

The spelling of 1066505669 in words is "one billion, sixty-six million, five hundred five thousand, six hundred sixty-nine".