666044206624 has 48 divisors (see below), whose sum is σ = 1324602744192. Its totient is φ = 329640081408.

The previous prime is 666044206591. The next prime is 666044206627. The reversal of 666044206624 is 426602440666.

It is a happy number.

It is a super-2 number, since 2×666044206624² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666044206627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7447357 + ... + 7536259.

It is an arithmetic number, because the mean of its divisors is an integer number (27595890504).

Almost surely, 2^666044206624 is an apocalyptic number.

It is an amenable number.

666044206624 is a deficient number, since it is larger than the sum of its proper divisors (658558537568).

666044206624 is a wasteful number, since it uses less digits than its factorization.

666044206624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91289 (or 91281 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 666044206624 in words is "six hundred sixty-six billion, forty-four million, two hundred six thousand, six hundred twenty-four".