8266791566 has 8 divisors (see below), whose sum is σ = 13527477144. Its totient is φ = 3757632520.

The previous prime is 8266791557. The next prime is 8266791571. The reversal of 8266791566 is 6651976628.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187881605 + ... + 187881648.

It is an arithmetic number, because the mean of its divisors is an integer number (1690934643).

Almost surely, 2^8266791566 is an apocalyptic number.

8266791566 is a deficient number, since it is larger than the sum of its proper divisors (5260685578).

8266791566 is a wasteful number, since it uses less digits than its factorization.

8266791566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375763266.

The product of its digits is 6531840, while the sum is 56.

The square root of 8266791566 is about 90921.8981654035. The cubic root of 8266791566 is about 2021.9899650978.

The spelling of 8266791566 in words is "eight billion, two hundred sixty-six million, seven hundred ninety-one thousand, five hundred sixty-six".