7881011283666 has 16 divisors (see below), whose sum is σ = 15886132982784. Its totient is φ = 2606318691984.

The previous prime is 7881011283647. The next prime is 7881011283667. The reversal of 7881011283666 is 6663821101887.

It is a happy number.

It is a super-3 number, since 3×7881011283666³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (7881011283667) 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, 5171266485 + ... + 5171268008.

It is an arithmetic number, because the mean of its divisors is an integer number (992883311424).

Almost surely, 2^{7881011283666} is an apocalyptic number.

7881011283666 is an abundant number, since it is smaller than the sum of its proper divisors (8005121699118).

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

7881011283666 is a wasteful number, since it uses less digits than its factorization.

7881011283666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10342534625.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 7881011283666 in words is "seven trillion, eight hundred eighty-one billion, eleven million, two hundred eighty-three thousand, six hundred sixty-six".