668007544382 has 4 divisors (see below), whose sum is σ = 1002011316576. Its totient is φ = 334003772190.

The previous prime is 668007544381. The next prime is 668007544433. The reversal of 668007544382 is 283445700866.

It is a happy number.

668007544382 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668007544381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167001886094 + ... + 167001886097.

It is an arithmetic number, because the mean of its divisors is an integer number (250502829144).

Almost surely, 2^668007544382 is an apocalyptic number.

668007544382 is a deficient number, since it is larger than the sum of its proper divisors (334003772194).

668007544382 is a wasteful number, since it uses less digits than its factorization.

668007544382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334003772193.

The product of its (nonzero) digits is 7741440, while the sum is 53.

The spelling of 668007544382 in words is "six hundred sixty-eight billion, seven million, five hundred forty-four thousand, three hundred eighty-two".