1066149771 has 4 divisors (see below), whose sum is σ = 1421533032. Its totient is φ = 710766512.

The previous prime is 1066149769. The next prime is 1066149803. The reversal of 1066149771 is 1779416601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1779416601 = 3 ⋅593138867.

It is a cyclic number.

It is not a de Polignac number, because 1066149771 - 2¹ = 1066149769 is a prime.

It is a super-2 number, since 2×1066149771² = 2273350668406704882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066149701) 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 in 3 ways as a sum of consecutive naturals, for example, 177691626 + ... + 177691631.

It is an arithmetic number, because the mean of its divisors is an integer number (355383258).

Almost surely, 2^1066149771 is an apocalyptic number.

1066149771 is a deficient number, since it is larger than the sum of its proper divisors (355383261).

1066149771 is an equidigital number, since it uses as much as digits as its factorization.

1066149771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355383260.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 1066149771 is about 32651.9489617389. The cubic root of 1066149771 is about 1021.5808406812.

The spelling of 1066149771 in words is "one billion, sixty-six million, one hundred forty-nine thousand, seven hundred seventy-one".