91226566 has 16 divisors (see below), whose sum is σ = 138682368. Its totient is φ = 45003400.

The previous prime is 91226561. The next prime is 91226609. The reversal of 91226566 is 66562219.

It is a super-3 number, since 3×91226566³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91226561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49131 + ... + 50953.

It is an arithmetic number, because the mean of its divisors is an integer number (8667648).

Almost surely, 2^91226566 is an apocalyptic number.

91226566 is a deficient number, since it is larger than the sum of its proper divisors (47455802).

91226566 is a wasteful number, since it uses less digits than its factorization.

91226566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its digits is 38880, while the sum is 37.

The square root of 91226566 is about 9551.2599168905. The cubic root of 91226566 is about 450.1671247554.

The spelling of 91226566 in words is "ninety-one million, two hundred twenty-six thousand, five hundred sixty-six".