866801811 has 8 divisors (see below), whose sum is σ = 1157492160. Its totient is φ = 576989672.

The previous prime is 866801809. The next prime is 866801813. The reversal of 866801811 is 118108668.

866801811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (866801809) and next prime (866801813).

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

It is a cyclic number.

It is not a de Polignac number, because 866801811 - 2¹ = 866801809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866801811.

It is not an unprimeable number, because it can be changed into a prime (866801813) 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, 217245 + ... + 221198.

It is an arithmetic number, because the mean of its divisors is an integer number (144686520).

Almost surely, 2^866801811 is an apocalyptic number.

866801811 is a deficient number, since it is larger than the sum of its proper divisors (290690349).

866801811 is a wasteful number, since it uses less digits than its factorization.

866801811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439105.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 866801811 is about 29441.4981106601. The cubic root of 866801811 is about 953.4690568199.

The spelling of 866801811 in words is "eight hundred sixty-six million, eight hundred one thousand, eight hundred eleven".