86665445 has 8 divisors (see below), whose sum is σ = 105703800. Its totient is φ = 68195520.

The previous prime is 86665417. The next prime is 86665451. The reversal of 86665445 is 54456668.

It can be written as a sum of positive squares in 4 ways, for example, as 7828804 + 78836641 = 2798^2 + 8879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86665445 - 2¹⁰ = 86664421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86665396 and 86665405.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 141770 + ... + 142379.

It is an arithmetic number, because the mean of its divisors is an integer number (13212975).

Almost surely, 2^86665445 is an apocalyptic number.

It is an amenable number.

86665445 is a deficient number, since it is larger than the sum of its proper divisors (19038355).

86665445 is a wasteful number, since it uses less digits than its factorization.

86665445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284215.

The product of its digits is 691200, while the sum is 44.

The square root of 86665445 is about 9309.4277482561. The cubic root of 86665445 is about 442.5360520490.

The spelling of 86665445 in words is "eighty-six million, six hundred sixty-five thousand, four hundred forty-five".