7766423617663 has 2 divisors, whose sum is σ = 7766423617664. Its totient is φ = 7766423617662.

The previous prime is 7766423617531. The next prime is 7766423617721. The reversal of 7766423617663 is 3667163246677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7766423617663 - 2¹³ = 7766423609471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7766423617595 and 7766423617604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7766423615663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3883211808831 + 3883211808832.

It is an arithmetic number, because the mean of its divisors is an integer number (3883211808832).

Almost surely, 2^{7766423617663} is an apocalyptic number.

7766423617663 is a deficient number, since it is larger than the sum of its proper divisors (1).

7766423617663 is an equidigital number, since it uses as much as digits as its factorization.

7766423617663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192036096, while the sum is 64.

The spelling of 7766423617663 in words is "seven trillion, seven hundred sixty-six billion, four hundred twenty-three million, six hundred seventeen thousand, six hundred sixty-three".