6716159792021 has 2 divisors, whose sum is σ = 6716159792022. Its totient is φ = 6716159792020.

The previous prime is 6716159792009. The next prime is 6716159792033. The reversal of 6716159792021 is 1202979516176.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6716159792009) and next prime (6716159792033).

It can be written as a sum of positive squares in only one way, i.e., 6203890359121 + 512269432900 = 2490761^2 + 715730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6716159792021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6716159792521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3358079896010 + 3358079896011.

It is an arithmetic number, because the mean of its divisors is an integer number (3358079896011).

Almost surely, 2^{6716159792021} is an apocalyptic number.

It is an amenable number.

6716159792021 is a deficient number, since it is larger than the sum of its proper divisors (1).

6716159792021 is an equidigital number, since it uses as much as digits as its factorization.

6716159792021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 6716159792021 in words is "six trillion, seven hundred sixteen billion, one hundred fifty-nine million, seven hundred ninety-two thousand, twenty-one".