766663340843 has 16 divisors (see below), whose sum is σ = 822244784256. Its totient is φ = 712261630080.

The previous prime is 766663340819. The next prime is 766663340881. The reversal of 766663340843 is 348043366667.

It is a cyclic number.

It is not a de Polignac number, because 766663340843 - 2³⁸ = 491785433899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766663340803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1420280 + ... + 1884282.

It is an arithmetic number, because the mean of its divisors is an integer number (51390299016).

Almost surely, 2^766663340843 is an apocalyptic number.

766663340843 is a deficient number, since it is larger than the sum of its proper divisors (55581443413).

766663340843 is a wasteful number, since it uses less digits than its factorization.

766663340843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465274.

The product of its (nonzero) digits is 31352832, while the sum is 56.

The spelling of 766663340843 in words is "seven hundred sixty-six billion, six hundred sixty-three million, three hundred forty thousand, eight hundred forty-three".