87966717588 has 18 divisors (see below), whose sum is σ = 222360313994. Its totient is φ = 29322239184.

The previous prime is 87966717529. The next prime is 87966717611. The reversal of 87966717588 is 88571766978.

It can be written as a sum of positive squares in only one way, i.e., 75294262404 + 12672455184 = 274398^2 + 112572^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1221759931 + ... + 1221760002.

Almost surely, 2^87966717588 is an apocalyptic number.

It is an amenable number.

87966717588 is an abundant number, since it is smaller than the sum of its proper divisors (134393596406).

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

87966717588 is a wasteful number, since it uses less digits than its factorization.

87966717588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443519943 (or 2443519938 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 72.

The spelling of 87966717588 in words is "eighty-seven billion, nine hundred sixty-six million, seven hundred seventeen thousand, five hundred eighty-eight".