266666222 has 4 divisors (see below), whose sum is σ = 399999336. Its totient is φ = 133333110.

The previous prime is 266666219. The next prime is 266666243. The reversal of 266666222 is 222666662.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×266666222² = 142221747911506568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66666554 + ... + 66666557.

It is an arithmetic number, because the mean of its divisors is an integer number (99999834).

Almost surely, 2^266666222 is an apocalyptic number.

266666222 is a deficient number, since it is larger than the sum of its proper divisors (133333114).

266666222 is a wasteful number, since it uses less digits than its factorization.

266666222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133333113.

The product of its digits is 124416, while the sum is 38.

The square root of 266666222 is about 16329.9180034684. The cubic root of 266666222 is about 643.6592319694.

The spelling of 266666222 in words is "two hundred sixty-six million, six hundred sixty-six thousand, two hundred twenty-two".