86646666 has 8 divisors (see below), whose sum is σ = 173293344. Its totient is φ = 28882220.

The previous prime is 86646661. The next prime is 86646683. The reversal of 86646666 is 66664668.

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

86646666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (86646661) 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 3 ways as a sum of consecutive naturals, for example, 7220550 + ... + 7220561.

It is an arithmetic number, because the mean of its divisors is an integer number (21661668).

Almost surely, 2^86646666 is an apocalyptic number.

86646666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86646666 is a wasteful number, since it uses less digits than its factorization.

86646666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14441116.

The product of its digits is 1492992, while the sum is 48.

The square root of 86646666 is about 9308.4190924131. The cubic root of 86646666 is about 442.5040862721.

The spelling of 86646666 in words is "eighty-six million, six hundred forty-six thousand, six hundred sixty-six".