86566778 has 16 divisors (see below), whose sum is σ = 132295680. Its totient is φ = 42475056.

The previous prime is 86566763. The next prime is 86566789. The reversal of 86566778 is 87766568.

It is a Curzon 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, 25751 + ... + 28917.

It is an arithmetic number, because the mean of its divisors is an integer number (8268480).

Almost surely, 2^86566778 is an apocalyptic number.

86566778 is a deficient number, since it is larger than the sum of its proper divisors (45728902).

86566778 is a wasteful number, since it uses less digits than its factorization.

86566778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421.

The product of its digits is 3386880, while the sum is 53.

The square root of 86566778 is about 9304.1269337859. The cubic root of 86566778 is about 442.3680485837.

The spelling of 86566778 in words is "eighty-six million, five hundred sixty-six thousand, seven hundred seventy-eight".