766663047887 has 12 divisors (see below), whose sum is σ = 854564710608. Its totient is φ = 687149971200.

The previous prime is 766663047881. The next prime is 766663047893. The reversal of 766663047887 is 788740366667.

It is an interprime number because it is at equal distance from previous prime (766663047881) and next prime (766663047893).

It is a de Polignac number, because none of the positive numbers 2^k-766663047887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766663047881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44611538 + ... + 44628719.

It is an arithmetic number, because the mean of its divisors is an integer number (71213725884).

Almost surely, 2^766663047887 is an apocalyptic number.

766663047887 is a deficient number, since it is larger than the sum of its proper divisors (87901662721).

766663047887 is a wasteful number, since it uses less digits than its factorization.

766663047887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89240350 (or 89240339 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 68.

The spelling of 766663047887 in words is "seven hundred sixty-six billion, six hundred sixty-three million, forty-seven thousand, eight hundred eighty-seven".