1066138771 has 2 divisors, whose sum is σ = 1066138772. Its totient is φ = 1066138770.

The previous prime is 1066138747. The next prime is 1066138817. The reversal of 1066138771 is 1778316601.

It is a weak prime.

It is an emirp because it is prime and its reverse (1778316601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1066138771 - 2⁵ = 1066138739 is a prime.

It is a super-2 number, since 2×1066138771² = 2273303758058780882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1066138471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533069385 + 533069386.

It is an arithmetic number, because the mean of its divisors is an integer number (533069386).

Almost surely, 2^1066138771 is an apocalyptic number.

1066138771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066138771 is an equidigital number, since it uses as much as digits as its factorization.

1066138771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1066138771 is about 32651.7805180667. The cubic root of 1066138771 is about 1021.5773272824.

The spelling of 1066138771 in words is "one billion, sixty-six million, one hundred thirty-eight thousand, seven hundred seventy-one".