6668181231539 has 8 divisors (see below), whose sum is σ = 6670027907328. Its totient is φ = 6666334800840.

The previous prime is 6668181231533. The next prime is 6668181231541. The reversal of 6668181231539 is 9351321818666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668181231539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668181231533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63052784 + ... + 63158450.

It is an arithmetic number, because the mean of its divisors is an integer number (833753488416).

Almost surely, 2^{6668181231539} is an apocalyptic number.

6668181231539 is a deficient number, since it is larger than the sum of its proper divisors (1846675789).

6668181231539 is a wasteful number, since it uses less digits than its factorization.

6668181231539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122545.

The product of its digits is 11197440, while the sum is 59.

The spelling of 6668181231539 in words is "six trillion, six hundred sixty-eight billion, one hundred eighty-one million, two hundred thirty-one thousand, five hundred thirty-nine".