66266227 has 4 divisors (see below), whose sum is σ = 67105120. Its totient is φ = 65427336.

The previous prime is 66266203. The next prime is 66266237. The reversal of 66266227 is 72266266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72266266 = 2 ⋅36133133.

It is a cyclic number.

It is not a de Polignac number, because 66266227 - 2¹¹ = 66264179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66266237) 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, 419328 + ... + 419485.

It is an arithmetic number, because the mean of its divisors is an integer number (16776280).

Almost surely, 2^66266227 is an apocalyptic number.

66266227 is a deficient number, since it is larger than the sum of its proper divisors (838893).

66266227 is an equidigital number, since it uses as much as digits as its factorization.

66266227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838892.

The product of its digits is 72576, while the sum is 37.

The square root of 66266227 is about 8140.4070537044. The cubic root of 66266227 is about 404.6666504576. Note that the first 4 decimals are identical.

The spelling of 66266227 in words is "sixty-six million, two hundred sixty-six thousand, two hundred twenty-seven".