666455413767188 has 12 divisors (see below), whose sum is σ = 1234902678451092. Its totient is φ = 313626077066880.

The previous prime is 666455413767181. The next prime is 666455413767193. The reversal of 666455413767188 is 881767314554666.

It can be written as a sum of positive squares in 2 ways, for example, as 305737394681104 + 360718019086084 = 17485348^2 + 18992578^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666455413767181) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4900407454103 + ... + 4900407454238.

It is an arithmetic number, because the mean of its divisors is an integer number (102908556537591).

Almost surely, 2^{666455413767188} is an apocalyptic number.

666455413767188 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

666455413767188 is a deficient number, since it is larger than the sum of its proper divisors (568447264683904).

666455413767188 is a wasteful number, since it uses less digits than its factorization.

666455413767188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9800814908362 (or 9800814908360 counting only the distinct ones).

The product of its digits is 4877107200, while the sum is 77.

The spelling of 666455413767188 in words is "six hundred sixty-six trillion, four hundred fifty-five billion, four hundred thirteen million, seven hundred sixty-seven thousand, one hundred eighty-eight".