766716563 has 2 divisors, whose sum is σ = 766716564. Its totient is φ = 766716562.

The previous prime is 766716469. The next prime is 766716589. The reversal of 766716563 is 365617667.

It is a strong prime.

It is an emirp because it is prime and its reverse (365617667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766716563 - 2¹⁶ = 766651027 is a prime.

It is not a weakly prime, because it can be changed into another prime (766716163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383358281 + 383358282.

It is an arithmetic number, because the mean of its divisors is an integer number (383358282).

Almost surely, 2^766716563 is an apocalyptic number.

766716563 is a deficient number, since it is larger than the sum of its proper divisors (1).

766716563 is an equidigital number, since it uses as much as digits as its factorization.

766716563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 47.

The square root of 766716563 is about 27689.6472169654. The cubic root of 766716563 is about 915.2609816224.

The spelling of 766716563 in words is "seven hundred sixty-six million, seven hundred sixteen thousand, five hundred sixty-three".