766297440647 has 2 divisors, whose sum is σ = 766297440648. Its totient is φ = 766297440646.

The previous prime is 766297440613. The next prime is 766297440677. The reversal of 766297440647 is 746044792667.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766297440647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766297440647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766297440677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383148720323 + 383148720324.

It is an arithmetic number, because the mean of its divisors is an integer number (383148720324).

Almost surely, 2^766297440647 is an apocalyptic number.

766297440647 is a deficient number, since it is larger than the sum of its proper divisors (1).

766297440647 is an equidigital number, since it uses as much as digits as its factorization.

766297440647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85349376, while the sum is 62.

The spelling of 766297440647 in words is "seven hundred sixty-six billion, two hundred ninety-seven million, four hundred forty thousand, six hundred forty-seven".