6668181231504 has 80 divisors (see below), whose sum is σ = 18982645991232. Its totient is φ = 2004032991744.

The previous prime is 6668181231497. The next prime is 6668181231533. The reversal of 6668181231504 is 4051321818666.

It is a happy number.

It is a super-3 number, since 3×6668181231504³ (a number of 39 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124231167 + ... + 124284830.

Almost surely, 2^{6668181231504} is an apocalyptic number.

It is an amenable number.

6668181231504 is an abundant number, since it is smaller than the sum of its proper divisors (12314464759728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6668181231504 is a wasteful number, since it uses less digits than its factorization.

6668181231504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248516064 (or 248516058 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 6668181231504 in words is "six trillion, six hundred sixty-eight billion, one hundred eighty-one million, two hundred thirty-one thousand, five hundred four".