6466770776647 has 2 divisors, whose sum is σ = 6466770776648. Its totient is φ = 6466770776646.

The previous prime is 6466770776633. The next prime is 6466770776651. The reversal of 6466770776647 is 7466770776646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6466770776647 - 2³⁵ = 6432411038279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6466770776647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6466770776047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233385388323 + 3233385388324.

It is an arithmetic number, because the mean of its divisors is an integer number (3233385388324).

Almost surely, 2^{6466770776647} is an apocalyptic number.

6466770776647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466770776647 is an equidigital number, since it uses as much as digits as its factorization.

6466770776647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2091059712, while the sum is 73.

Subtracting 6466770776647 from its reverse (7466770776646), we obtain a palindrome (999999999999).

The spelling of 6466770776647 in words is "six trillion, four hundred sixty-six billion, seven hundred seventy million, seven hundred seventy-six thousand, six hundred forty-seven".