664041266 has 32 divisors (see below), whose sum is σ = 1186790400. Its totient is φ = 272664000.

The previous prime is 664041263. The next prime is 664041281. The reversal of 664041266 is 662140466.

It is a super-3 number, since 3×664041266³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (664041263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36260 + ... + 51408.

It is an arithmetic number, because the mean of its divisors is an integer number (37087200).

Almost surely, 2^664041266 is an apocalyptic number.

664041266 is a deficient number, since it is larger than the sum of its proper divisors (522749134).

664041266 is a wasteful number, since it uses less digits than its factorization.

664041266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15290.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 664041266 is about 25768.9981566998. The cubic root of 664041266 is about 872.4322067287.

The spelling of 664041266 in words is "six hundred sixty-four million, forty-one thousand, two hundred sixty-six".