8243820266 has 48 divisors (see below), whose sum is σ = 14189333760. Its totient is φ = 3585278400.

The previous prime is 8243820197. The next prime is 8243820269. The reversal of 8243820266 is 6620283428.

8243820266 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8243820266² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8243820269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661505 + ... + 673851.

It is an arithmetic number, because the mean of its divisors is an integer number (295611120).

Almost surely, 2^8243820266 is an apocalyptic number.

8243820266 is a deficient number, since it is larger than the sum of its proper divisors (5945513494).

8243820266 is a wasteful number, since it uses less digits than its factorization.

8243820266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12491 (or 12480 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 8243820266 is about 90795.4859340485. The cubic root of 8243820266 is about 2020.1153633098.

The spelling of 8243820266 in words is "eight billion, two hundred forty-three million, eight hundred twenty thousand, two hundred sixty-six".