666037227555730 has 128 divisors (see below), whose sum is σ = 1270570109792256. Its totient is φ = 250865847724800.

The previous prime is 666037227555617. The next prime is 666037227555773. The reversal of 666037227555730 is 37555722730666.

It is a happy number.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18885547557 + ... + 18885582823.

It is an arithmetic number, because the mean of its divisors is an integer number (9926328982752).

Almost surely, 2^{666037227555730} is an apocalyptic number.

666037227555730 is a deficient number, since it is larger than the sum of its proper divisors (604532882236526).

666037227555730 is a wasteful number, since it uses less digits than its factorization.

666037227555730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38872.

The product of its (nonzero) digits is 333396000, while the sum is 64.

The spelling of 666037227555730 in words is "six hundred sixty-six trillion, thirty-seven billion, two hundred twenty-seven million, five hundred fifty-five thousand, seven hundred thirty".