87765803766 has 24 divisors (see below), whose sum is σ = 191154847104. Its totient is φ = 29102097840.

The previous prime is 87765803761. The next prime is 87765803773. The reversal of 87765803766 is 66730856778.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87765803761) 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, 12760641 + ... + 12767516.

It is an arithmetic number, because the mean of its divisors is an integer number (7964785296).

Almost surely, 2^87765803766 is an apocalyptic number.

87765803766 is an abundant number, since it is smaller than the sum of its proper divisors (103389043338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87765803766 is a wasteful number, since it uses less digits than its factorization.

87765803766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25528356 (or 25528353 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 87765803766 in words is "eighty-seven billion, seven hundred sixty-five million, eight hundred three thousand, seven hundred sixty-six".