662381381218 has 16 divisors (see below), whose sum is σ = 998190044280. Its totient is φ = 329652374656.

The previous prime is 662381381191. The next prime is 662381381239. The reversal of 662381381218 is 812183183266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 149148122809 + 513233258409 = 386197^2 + 716403^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071528 + ... + 1572556.

Almost surely, 2^662381381218 is an apocalyptic number.

662381381218 is a deficient number, since it is larger than the sum of its proper divisors (335808663062).

662381381218 is a wasteful number, since it uses less digits than its factorization.

662381381218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504101.

The product of its digits is 663552, while the sum is 49.

The spelling of 662381381218 in words is "six hundred sixty-two billion, three hundred eighty-one million, three hundred eighty-one thousand, two hundred eighteen".