86665698 has 24 divisors (see below), whose sum is σ = 214601088. Its totient is φ = 24761592.

The previous prime is 86665687. The next prime is 86665703. The reversal of 86665698 is 89656668.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343786 + ... + 344037.

It is an arithmetic number, because the mean of its divisors is an integer number (8941712).

Almost surely, 2^86665698 is an apocalyptic number.

86665698 is an abundant number, since it is smaller than the sum of its proper divisors (127935390).

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

86665698 is a wasteful number, since it uses less digits than its factorization.

86665698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687838 (or 687835 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 86665698 is about 9309.4413366217. The cubic root of 86665698 is about 442.5364826762.

It can be divided in two parts, 866 and 65698, that added together give a square (66564 = 258²).

The spelling of 86665698 in words is "eighty-six million, six hundred sixty-five thousand, six hundred ninety-eight".