666055550666 has 16 divisors (see below), whose sum is σ = 1092050376480. Its totient is φ = 302157719280.

The previous prime is 666055550663. The next prime is 666055550683.

666055550666 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (666055550663) 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, 29728736 + ... + 29751131.

It is an arithmetic number, because the mean of its divisors is an integer number (68253148530).

Almost surely, 2^666055550666 is an apocalyptic number.

666055550666 is a deficient number, since it is larger than the sum of its proper divisors (425994825814).

666055550666 is a wasteful number, since it uses less digits than its factorization.

666055550666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59480389.

The product of its (nonzero) digits is 29160000, while the sum is 56.

The spelling of 666055550666 in words is "six hundred sixty-six billion, fifty-five million, five hundred fifty thousand, six hundred sixty-six".