86665718 has 16 divisors (see below), whose sum is σ = 133827120. Its totient is φ = 42067200.

The previous prime is 86665703. The next prime is 86665721. The reversal of 86665718 is 81756668.

It is a Curzon number.

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, 14798 + ... + 19806.

It is an arithmetic number, because the mean of its divisors is an integer number (8364195).

Almost surely, 2^86665718 is an apocalyptic number.

86665718 is a deficient number, since it is larger than the sum of its proper divisors (47161402).

86665718 is a wasteful number, since it uses less digits than its factorization.

86665718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263.

The product of its digits is 483840, while the sum is 47.

The square root of 86665718 is about 9309.4424107999. The cubic root of 86665718 is about 442.5365167179.

The spelling of 86665718 in words is "eighty-six million, six hundred sixty-five thousand, seven hundred eighteen".