6721970279 has 2 divisors, whose sum is σ = 6721970280. Its totient is φ = 6721970278.

The previous prime is 6721970263. The next prime is 6721970293. The reversal of 6721970279 is 9720791276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6721970279 - 2⁴ = 6721970263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6721970239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360985139 + 3360985140.

It is an arithmetic number, because the mean of its divisors is an integer number (3360985140).

Almost surely, 2^6721970279 is an apocalyptic number.

6721970279 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721970279 is an equidigital number, since it uses as much as digits as its factorization.

6721970279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 6721970279 is about 81987.6227183104. The cubic root of 6721970279 is about 1887.2620021482.

The spelling of 6721970279 in words is "six billion, seven hundred twenty-one million, nine hundred seventy thousand, two hundred seventy-nine".