1066019869 has 2 divisors, whose sum is σ = 1066019870. Its totient is φ = 1066019868.

The previous prime is 1066019863. The next prime is 1066019989. The reversal of 1066019869 is 9689106601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060283844 + 5736025 = 32562^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066019869 - 2³ = 1066019861 is a prime.

It is a super-2 number, since 2×1066019869² = 2272796722205554322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066019861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533009934 + 533009935.

It is an arithmetic number, because the mean of its divisors is an integer number (533009935).

Almost surely, 2^1066019869 is an apocalyptic number.

It is an amenable number.

1066019869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066019869 is an equidigital number, since it uses as much as digits as its factorization.

1066019869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1066019869 is about 32649.9597090104. The cubic root of 1066019869 is about 1021.5393484544.

The spelling of 1066019869 in words is "one billion, sixty-six million, nineteen thousand, eight hundred sixty-nine".