6721622736287 has 2 divisors, whose sum is σ = 6721622736288. Its totient is φ = 6721622736286.

The previous prime is 6721622736197. The next prime is 6721622736307. The reversal of 6721622736287 is 7826372261276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6721622736287 - 2²⁸ = 6721354300831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6721622706287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360811368143 + 3360811368144.

It is an arithmetic number, because the mean of its divisors is an integer number (3360811368144).

Almost surely, 2^{6721622736287} is an apocalyptic number.

6721622736287 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721622736287 is an equidigital number, since it uses as much as digits as its factorization.

6721622736287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28449792, while the sum is 59.

The spelling of 6721622736287 in words is "six trillion, seven hundred twenty-one billion, six hundred twenty-two million, seven hundred thirty-six thousand, two hundred eighty-seven".