6922056721 has 2 divisors, whose sum is σ = 6922056722. Its totient is φ = 6922056720.

The previous prime is 6922056683. The next prime is 6922056767. The reversal of 6922056721 is 1276502296.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5007119121 + 1914937600 = 70761^2 + 43760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6922056721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6922056781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3461028360 + 3461028361.

It is an arithmetic number, because the mean of its divisors is an integer number (3461028361).

Almost surely, 2^6922056721 is an apocalyptic number.

It is an amenable number.

6922056721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6922056721 is an equidigital number, since it uses as much as digits as its factorization.

6922056721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 6922056721 is about 83198.8985564112. The cubic root of 6922056721 is about 1905.8046601261.

The spelling of 6922056721 in words is "six billion, nine hundred twenty-two million, fifty-six thousand, seven hundred twenty-one".