6721056271 has 2 divisors, whose sum is σ = 6721056272. Its totient is φ = 6721056270.

The previous prime is 6721056247. The next prime is 6721056341. The reversal of 6721056271 is 1726501276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6721056271 - 2⁵ = 6721056239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6721056271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6721056871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360528135 + 3360528136.

It is an arithmetic number, because the mean of its divisors is an integer number (3360528136).

Almost surely, 2^6721056271 is an apocalyptic number.

6721056271 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721056271 is an equidigital number, since it uses as much as digits as its factorization.

6721056271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 6721056271 is about 81982.0484679421. The cubic root of 6721056271 is about 1887.1764592352.

The spelling of 6721056271 in words is "six billion, seven hundred twenty-one million, fifty-six thousand, two hundred seventy-one".