1066612109 has 2 divisors, whose sum is σ = 1066612110. Its totient is φ = 1066612108.

The previous prime is 1066612103. The next prime is 1066612117. The reversal of 1066612109 is 9012166601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948455209 + 118156900 = 30797^2 + 10870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066612109 - 2⁴ = 1066612093 is a prime.

It is a super-2 number, since 2×1066612109² = 2275322782130855762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066612103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533306054 + 533306055.

It is an arithmetic number, because the mean of its divisors is an integer number (533306055).

Almost surely, 2^1066612109 is an apocalyptic number.

It is an amenable number.

1066612109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066612109 is an equidigital number, since it uses as much as digits as its factorization.

1066612109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1066612109 is about 32659.0279861480. The cubic root of 1066612109 is about 1021.7284895383.

The spelling of 1066612109 in words is "one billion, sixty-six million, six hundred twelve thousand, one hundred nine".