140081065668 has 72 divisors (see below), whose sum is σ = 370093284288. Its totient is φ = 44590506048.

The previous prime is 140081065661. The next prime is 140081065699. The reversal of 140081065668 is 866560180041.

140081065668 is a `hidden beast` number, since 1 + 4 + 0 + 0 + 81 + 0 + 6 + 566 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (140081065661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 369571 + ... + 645557.

It is an arithmetic number, because the mean of its divisors is an integer number (5140184504).

Almost surely, 2^140081065668 is an apocalyptic number.

140081065668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140081065668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185046642144).

140081065668 is an abundant number, since it is smaller than the sum of its proper divisors (230012218620).

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

140081065668 is a wasteful number, since it uses less digits than its factorization.

140081065668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276633 (or 276628 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 140081065668 in words is "one hundred forty billion, eighty-one million, sixty-five thousand, six hundred sixty-eight".