8266397215 has 4 divisors (see below), whose sum is σ = 9919676664. Its totient is φ = 6613117768.

The previous prime is 8266397213. The next prime is 8266397273. The reversal of 8266397215 is 5127936628.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8266397215 - 2¹ = 8266397213 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8266397213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826639717 + ... + 826639726.

It is an arithmetic number, because the mean of its divisors is an integer number (2479919166).

Almost surely, 2^8266397215 is an apocalyptic number.

8266397215 is a deficient number, since it is larger than the sum of its proper divisors (1653279449).

8266397215 is a wasteful number, since it uses less digits than its factorization.

8266397215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653279448.

The product of its digits is 1088640, while the sum is 49.

The square root of 8266397215 is about 90919.7295145559. The cubic root of 8266397215 is about 2021.9578129044.

The spelling of 8266397215 in words is "eight billion, two hundred sixty-six million, three hundred ninety-seven thousand, two hundred fifteen".