664662226 has 32 divisors (see below), whose sum is σ = 1075035888. Its totient is φ = 307077120.

The previous prime is 664662197. The next prime is 664662239. The reversal of 664662226 is 622266466.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 479566201 + 185096025 = 21899^2 + 13605^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 696966 + ... + 697918.

Almost surely, 2^664662226 is an apocalyptic number.

664662226 is a deficient number, since it is larger than the sum of its proper divisors (410373662).

664662226 is a wasteful number, since it uses less digits than its factorization.

664662226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326.

The product of its digits is 248832, while the sum is 40.

The square root of 664662226 is about 25781.0439276613. The cubic root of 664662226 is about 872.7040656991.

The spelling of 664662226 in words is "six hundred sixty-four million, six hundred sixty-two thousand, two hundred twenty-six".