806111111 has 8 divisors (see below), whose sum is σ = 870747024. Its totient is φ = 741850560.

The previous prime is 806111101. The next prime is 806111113. The reversal of 806111111 is 111111608.

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 806111111 - 2²⁶ = 739002247 is a prime.

It is a Duffinian number.

806111111 is a modest number, since divided by 11111 gives 8061 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806111113) 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, 89366 + ... + 97971.

It is an arithmetic number, because the mean of its divisors is an integer number (108843378).

Almost surely, 2^806111111 is an apocalyptic number.

806111111 is a deficient number, since it is larger than the sum of its proper divisors (64635913).

806111111 is a wasteful number, since it uses less digits than its factorization.

806111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187681.

The product of its (nonzero) digits is 48, while the sum is 20.

The square root of 806111111 is about 28392.0959247464. The cubic root of 806111111 is about 930.6755453205.

Adding to 806111111 its reverse (111111608), we get a palindrome (917222719).

The spelling of 806111111 in words is "eight hundred six million, one hundred eleven thousand, one hundred eleven".