1066646069 has 2 divisors, whose sum is σ = 1066646070. Its totient is φ = 1066646068.

The previous prime is 1066646039. The next prime is 1066646099. The reversal of 1066646069 is 9606466601.

It is a balanced prime because it is at equal distance from previous prime (1066646039) and next prime (1066646099).

It can be written as a sum of positive squares in only one way, i.e., 668843044 + 397803025 = 25862^2 + 19945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066646069 - 2²⁰ = 1065597493 is a prime.

It is a super-2 number, since 2×1066646069² = 2275467673026305522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066646039) 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, 533323034 + 533323035.

It is an arithmetic number, because the mean of its divisors is an integer number (533323035).

Almost surely, 2^1066646069 is an apocalyptic number.

It is an amenable number.

1066646069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066646069 is an equidigital number, since it uses as much as digits as its factorization.

1066646069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 1066646069 is about 32659.5478995041. The cubic root of 1066646069 is about 1021.7393330715.

The spelling of 1066646069 in words is "one billion, sixty-six million, six hundred forty-six thousand, sixty-nine".