7081666311 has 4 divisors (see below), whose sum is σ = 9442221752. Its totient is φ = 4721110872.

The previous prime is 7081666261. The next prime is 7081666321. The reversal of 7081666311 is 1136661807.

7081666311 is digitally balanced in base 3, 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 not a de Polignac number, because 7081666311 - 2¹⁸ = 7081404167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7081666311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7081666321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180277716 + ... + 1180277721.

It is an arithmetic number, because the mean of its divisors is an integer number (2360555438).

Almost surely, 2^7081666311 is an apocalyptic number.

7081666311 is a deficient number, since it is larger than the sum of its proper divisors (2360555441).

7081666311 is a wasteful number, since it uses less digits than its factorization.

7081666311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360555440.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 7081666311 is about 84152.6369818558. The cubic root of 7081666311 is about 1920.3415833775.

The spelling of 7081666311 in words is "seven billion, eighty-one million, six hundred sixty-six thousand, three hundred eleven".