66666226 has 8 divisors (see below), whose sum is σ = 109090224. Its totient is φ = 30302820.

The previous prime is 66666199. The next prime is 66666227. The reversal of 66666226 is 62266666.

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

It is not an unprimeable number, because it can be changed into a prime (66666227) 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, 1515120 + ... + 1515163.

It is an arithmetic number, because the mean of its divisors is an integer number (13636278).

Almost surely, 2^66666226 is an apocalyptic number.

66666226 is a deficient number, since it is larger than the sum of its proper divisors (42423998).

66666226 is a wasteful number, since it uses less digits than its factorization.

66666226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030296.

The product of its digits is 186624, while the sum is 40.

The square root of 66666226 is about 8164.9388240207. The cubic root of 66666226 is about 405.4792396284.

The spelling of 66666226 in words is "sixty-six million, six hundred sixty-six thousand, two hundred twenty-six".