6776263421 has 2 divisors, whose sum is σ = 6776263422. Its totient is φ = 6776263420.

The previous prime is 6776263391. The next prime is 6776263423. The reversal of 6776263421 is 1243626776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3616699321 + 3159564100 = 60139^2 + 56210^2 .

It is a cyclic number.

It is not a de Polignac number, because 6776263421 - 2⁶ = 6776263357 is a prime.

Together with 6776263423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6776263423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388131710 + 3388131711.

It is an arithmetic number, because the mean of its divisors is an integer number (3388131711).

Almost surely, 2^6776263421 is an apocalyptic number.

It is an amenable number.

6776263421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6776263421 is an equidigital number, since it uses as much as digits as its factorization.

6776263421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 44.

The square root of 6776263421 is about 82318.0625440128. The cubic root of 6776263421 is about 1892.3295017552.

The spelling of 6776263421 in words is "six billion, seven hundred seventy-six million, two hundred sixty-three thousand, four hundred twenty-one".