1066636811 has 2 divisors, whose sum is σ = 1066636812. Its totient is φ = 1066636810.

The previous prime is 1066636807. The next prime is 1066636817. The reversal of 1066636811 is 1186366601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1066636811 - 2² = 1066636807 is a prime.

It is a super-2 number, since 2×1066636811² = 2275428173160499442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1066636817) 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 as a sum of consecutive naturals, namely, 533318405 + 533318406.

It is an arithmetic number, because the mean of its divisors is an integer number (533318406).

Almost surely, 2^1066636811 is an apocalyptic number.

1066636811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066636811 is an equidigital number, since it uses as much as digits as its factorization.

1066636811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1066636811 is about 32659.4061642278. The cubic root of 1066636811 is about 1021.7363769862.

The spelling of 1066636811 in words is "one billion, sixty-six million, six hundred thirty-six thousand, eight hundred eleven".