816227086766 has 32 divisors (see below), whose sum is σ = 1543633979328. Its totient is φ = 315027336960.

The previous prime is 816227086751. The next prime is 816227086771. The reversal of 816227086766 is 667680722618.

It is a happy number.

It is a super-2 number, since 2×816227086766² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 54684785 + ... + 54699708.

It is an arithmetic number, because the mean of its divisors is an integer number (48238561854).

Almost surely, 2^816227086766 is an apocalyptic number.

816227086766 is a deficient number, since it is larger than the sum of its proper divisors (727406892562).

816227086766 is a wasteful number, since it uses less digits than its factorization.

816227086766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109384556.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 816227086766 in words is "eight hundred sixteen billion, two hundred twenty-seven million, eighty-six thousand, seven hundred sixty-six".