665606222 has 16 divisors (see below), whose sum is σ = 1008927360. Its totient is φ = 329315448.

The previous prime is 665606213. The next prime is 665606237. The reversal of 665606222 is 222606566.

665606222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×665606222² = 886063285530226568, 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 in 7 ways as a sum of consecutive naturals, for example, 71429 + ... + 80207.

It is an arithmetic number, because the mean of its divisors is an integer number (63057960).

Almost surely, 2^665606222 is an apocalyptic number.

665606222 is a deficient number, since it is larger than the sum of its proper divisors (343321138).

665606222 is a wasteful number, since it uses less digits than its factorization.

665606222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9175.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 665606222 is about 25799.3453792921. The cubic root of 665606222 is about 873.1170270520.

The spelling of 665606222 in words is "six hundred sixty-five million, six hundred six thousand, two hundred twenty-two".