66222227 has 2 divisors, whose sum is σ = 66222228. Its totient is φ = 66222226.

The previous prime is 66222209. The next prime is 66222253. The reversal of 66222227 is 72222266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66222227 - 2²² = 62027923 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66222227.

It is not a weakly prime, because it can be changed into another prime (66221227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33111113 + 33111114.

It is an arithmetic number, because the mean of its divisors is an integer number (33111114).

Almost surely, 2^66222227 is an apocalyptic number.

66222227 is a deficient number, since it is larger than the sum of its proper divisors (1).

66222227 is an equidigital number, since it uses as much as digits as its factorization.

66222227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 29.

The square root of 66222227 is about 8137.7040373806. The cubic root of 66222227 is about 404.5770659853.

The spelling of 66222227 in words is "sixty-six million, two hundred twenty-two thousand, two hundred twenty-seven".