387666822218 has 24 divisors (see below), whose sum is σ = 629771144076. Its totient is φ = 178894934400.

The previous prime is 387666822217. The next prime is 387666822233. The reversal of 387666822218 is 812228666783.

It can be written as a sum of positive squares in 6 ways, for example, as 111624814609 + 276042007609 = 334103^2 + 525397^2 .

It is not an unprimeable number, because it can be changed into a prime (387666822217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2137238 + ... + 2311518.

Almost surely, 2^387666822218 is an apocalyptic number.

387666822218 is a deficient number, since it is larger than the sum of its proper divisors (242104321858).

387666822218 is a wasteful number, since it uses less digits than its factorization.

387666822218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180890 (or 180877 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 59.

The spelling of 387666822218 in words is "three hundred eighty-seven billion, six hundred sixty-six million, eight hundred twenty-two thousand, two hundred eighteen".