806428288666 has 64 divisors (see below), whose sum is σ = 1624298409216. Its totient is φ = 289995033600.

The previous prime is 806428288657. The next prime is 806428288693. The reversal of 806428288666 is 666882824608.

It is a junction number, because it is equal to n+sod(n) for n = 806428288598 and 806428288607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35450056 + ... + 35472796.

It is an arithmetic number, because the mean of its divisors is an integer number (25379662644).

Almost surely, 2^806428288666 is an apocalyptic number.

806428288666 is an abundant number, since it is smaller than the sum of its proper divisors (817870120550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806428288666 is a wasteful number, since it uses less digits than its factorization.

806428288666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40487.

The product of its (nonzero) digits is 84934656, while the sum is 64.

The spelling of 806428288666 in words is "eight hundred six billion, four hundred twenty-eight million, two hundred eighty-eight thousand, six hundred sixty-six".