664441226 has 32 divisors (see below), whose sum is σ = 1072627920. Its totient is φ = 307584000.

The previous prime is 664441189. The next prime is 664441249. The reversal of 664441226 is 622144466.

It can be written as a sum of positive squares in 8 ways, for example, as 388050601 + 276390625 = 19699^2 + 16625^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621020 + ... + 622088.

Almost surely, 2^664441226 is an apocalyptic number.

664441226 is a deficient number, since it is larger than the sum of its proper divisors (408186694).

664441226 is a wasteful number, since it uses less digits than its factorization.

664441226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370.

The product of its digits is 55296, while the sum is 35.

The square root of 664441226 is about 25776.7574764554. The cubic root of 664441226 is about 872.6073303594.

The spelling of 664441226 in words is "six hundred sixty-four million, four hundred forty-one thousand, two hundred twenty-six".