666541188430 has 32 divisors (see below), whose sum is σ = 1292114273184. Its totient is φ = 246098027136.

The previous prime is 666541188421. The next prime is 666541188457. The reversal of 666541188430 is 34881145666.

It is a congruent number.

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, 3908424 + ... + 4075396.

It is an arithmetic number, because the mean of its divisors is an integer number (40378571037).

Almost surely, 2^666541188430 is an apocalyptic number.

666541188430 is a deficient number, since it is larger than the sum of its proper divisors (625573084754).

666541188430 is a wasteful number, since it uses less digits than its factorization.

666541188430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197700.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 666541188430 in words is "six hundred sixty-six billion, five hundred forty-one million, one hundred eighty-eight thousand, four hundred thirty".