86666570 has 16 divisors (see below), whose sum is σ = 156503880. Its totient is φ = 34554624.

The previous prime is 86666563. The next prime is 86666603. The reversal of 86666570 is 7566668.

It can be written as a sum of positive squares in 4 ways, for example, as 20097289 + 66569281 = 4483^2 + 8159^2 .

It is a super-2 number, since 2×86666570² = 15022188711129800, which contains 22 as substring.

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, 10715 + ... + 16974.

Almost surely, 2^86666570 is an apocalyptic number.

86666570 is a deficient number, since it is larger than the sum of its proper divisors (69837310).

86666570 is a wasteful number, since it uses less digits than its factorization.

86666570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28009.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 86666570 is about 9309.4881706783. The cubic root of 86666570 is about 442.5379668871.

The spelling of 86666570 in words is "eighty-six million, six hundred sixty-six thousand, five hundred seventy".