87777116660 has 48 divisors (see below), whose sum is σ = 187560817920. Its totient is φ = 34496488320.

The previous prime is 87777116653. The next prime is 87777116677. The reversal of 87777116660 is 6661177778.

It is a junction number, because it is equal to n+sod(n) for n = 87777116596 and 87777116605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2195045 + ... + 2234675.

It is an arithmetic number, because the mean of its divisors is an integer number (3907517040).

Almost surely, 2^87777116660 is an apocalyptic number.

It is an amenable number.

87777116660 is an abundant number, since it is smaller than the sum of its proper divisors (99783701260).

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

87777116660 is a wasteful number, since it uses less digits than its factorization.

87777116660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41576 (or 41574 counting only the distinct ones).

The product of its (nonzero) digits is 4148928, while the sum is 56.

The spelling of 87777116660 in words is "eighty-seven billion, seven hundred seventy-seven million, one hundred sixteen thousand, six hundred sixty".