87665656678 has 16 divisors (see below), whose sum is σ = 139410649584. Its totient is φ = 41201994240.

The previous prime is 87665656669. The next prime is 87665656681.

87665656678 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×87665656678³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611363 + ... + 1664878.

It is an arithmetic number, because the mean of its divisors is an integer number (8713165599).

Almost surely, 2^87665656678 is an apocalyptic number.

87665656678 is a deficient number, since it is larger than the sum of its proper divisors (51744992906).

87665656678 is a wasteful number, since it uses less digits than its factorization.

87665656678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277047.

The product of its digits is 609638400, while the sum is 70.

The spelling of 87665656678 in words is "eighty-seven billion, six hundred sixty-five million, six hundred fifty-six thousand, six hundred seventy-eight".