7036776721 has 8 divisors (see below), whose sum is σ = 7592082344. Its totient is φ = 6483473280.

The previous prime is 7036776709. The next prime is 7036776737. The reversal of 7036776721 is 1276776307.

7036776721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 686440000 + 6350336721 = 26200^2 + 79689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7036776721 - 2⁵ = 7036776689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7036776751) 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, 493236 + ... + 507301.

It is an arithmetic number, because the mean of its divisors is an integer number (949010293).

Almost surely, 2^7036776721 is an apocalyptic number.

It is an amenable number.

7036776721 is a deficient number, since it is larger than the sum of its proper divisors (555305623).

7036776721 is a wasteful number, since it uses less digits than its factorization.

7036776721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001091.

The product of its (nonzero) digits is 518616, while the sum is 46.

The square root of 7036776721 is about 83885.4976798731. The cubic root of 7036776721 is about 1916.2753966009.

The spelling of 7036776721 in words is "seven billion, thirty-six million, seven hundred seventy-six thousand, seven hundred twenty-one".