811066849 has 2 divisors, whose sum is σ = 811066850. Its totient is φ = 811066848.

The previous prime is 811066829. The next prime is 811066891. The reversal of 811066849 is 948660118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502432225 + 308634624 = 22415^2 + 17568^2 .

It is a cyclic number.

It is not a de Polignac number, because 811066849 - 2¹³ = 811058657 is a prime.

It is not a weakly prime, because it can be changed into another prime (811066819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405533424 + 405533425.

It is an arithmetic number, because the mean of its divisors is an integer number (405533425).

Almost surely, 2^811066849 is an apocalyptic number.

It is an amenable number.

811066849 is a deficient number, since it is larger than the sum of its proper divisors (1).

811066849 is an equidigital number, since it uses as much as digits as its factorization.

811066849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 811066849 is about 28479.2354005510. The cubic root of 811066849 is about 932.5788250684.

The spelling of 811066849 in words is "eight hundred eleven million, sixty-six thousand, eight hundred forty-nine".