1066138289 has 8 divisors (see below), whose sum is σ = 1129137480. Its totient is φ = 1003170816.

The previous prime is 1066138273. The next prime is 1066138291. The reversal of 1066138289 is 9828316601.

It can be written as a sum of positive squares in 4 ways, for example, as 302168689 + 763969600 = 17383^2 + 27640^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1066138289 - 2⁴ = 1066138273 is a prime.

It is a super-2 number, since 2×1066138289² = 2273301702543695042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066138219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127757 + ... + 135845.

It is an arithmetic number, because the mean of its divisors is an integer number (141142185).

Almost surely, 2^1066138289 is an apocalyptic number.

It is an amenable number.

1066138289 is a deficient number, since it is larger than the sum of its proper divisors (62999191).

1066138289 is an equidigital number, since it uses as much as digits as its factorization.

1066138289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15859.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1066138289 is about 32651.7731371514. The cubic root of 1066138289 is about 1021.5771733311.

The spelling of 1066138289 in words is "one billion, sixty-six million, one hundred thirty-eight thousand, two hundred eighty-nine".