7216866739 has 2 divisors, whose sum is σ = 7216866740. Its totient is φ = 7216866738.

The previous prime is 7216866737. The next prime is 7216866793. The reversal of 7216866739 is 9376686127.

It is a happy number.

7216866739 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (7216866793) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (9376686127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7216866739 - 2¹ = 7216866737 is a prime.

Together with 7216866737, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7216866739.

It is not a weakly prime, because it can be changed into another prime (7216866737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608433369 + 3608433370.

It is an arithmetic number, because the mean of its divisors is an integer number (3608433370).

Almost surely, 2^7216866739 is an apocalyptic number.

7216866739 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216866739 is an equidigital number, since it uses as much as digits as its factorization.

7216866739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 55.

The square root of 7216866739 is about 84952.1438163864. The cubic root of 7216866739 is about 1932.4854319724.

The spelling of 7216866739 in words is "seven billion, two hundred sixteen million, eight hundred sixty-six thousand, seven hundred thirty-nine".