816566022 has 56 divisors (see below), whose sum is σ = 1849093680. Its totient is φ = 270313200.

The previous prime is 816566017. The next prime is 816566029. The reversal of 816566022 is 220665618.

816566022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816566029) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 218304 + ... + 222012.

It is an arithmetic number, because the mean of its divisors is an integer number (33019530).

Almost surely, 2^816566022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816566022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924546840).

816566022 is an abundant number, since it is smaller than the sum of its proper divisors (1032527658).

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

816566022 is a wasteful number, since it uses less digits than its factorization.

816566022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880 (or 3865 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 816566022 is about 28575.6193633664. The cubic root of 816566022 is about 934.6817611611.

It can be divided in two parts, 81656 and 6022, that added together give a palindrome (87678).

The spelling of 816566022 in words is "eight hundred sixteen million, five hundred sixty-six thousand, twenty-two".