86661573 has 8 divisors (see below), whose sum is σ = 115672128. Its totient is φ = 57712704.

The previous prime is 86661571. The next prime is 86661581. The reversal of 86661573 is 37516668.

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

It is not a de Polignac number, because 86661573 - 2¹ = 86661571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86661571) by changing a digit.

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, 12036 + ... + 17837.

It is an arithmetic number, because the mean of its divisors is an integer number (14459016).

Almost surely, 2^86661573 is an apocalyptic number.

It is an amenable number.

86661573 is a deficient number, since it is larger than the sum of its proper divisors (29010555).

86661573 is a wasteful number, since it uses less digits than its factorization.

86661573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30843.

The product of its digits is 181440, while the sum is 42.

The square root of 86661573 is about 9309.2197847081. The cubic root of 86661573 is about 442.5294614749.

The spelling of 86661573 in words is "eighty-six million, six hundred sixty-one thousand, five hundred seventy-three".