8266291091 has 4 divisors (see below), whose sum is σ = 8266693512. Its totient is φ = 8265888672.

The previous prime is 8266291087. The next prime is 8266291133. The reversal of 8266291091 is 1901926628.

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 8266291091 - 2² = 8266291087 is a prime.

It is a super-2 number, since 2×8266291091² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8266291001) 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, 168641 + ... + 212066.

It is an arithmetic number, because the mean of its divisors is an integer number (2066673378).

Almost surely, 2^8266291091 is an apocalyptic number.

8266291091 is a deficient number, since it is larger than the sum of its proper divisors (402421).

8266291091 is a wasteful number, since it uses less digits than its factorization.

8266291091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402420.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 8266291091 is about 90919.1458989799. The cubic root of 8266291091 is about 2021.9491602365.

The spelling of 8266291091 in words is "eight billion, two hundred sixty-six million, two hundred ninety-one thousand, ninety-one".