86646321 has 16 divisors (see below), whose sum is σ = 128742720. Its totient is φ = 57594240.

The previous prime is 86646319. The next prime is 86646337. The reversal of 86646321 is 12364668.

86646321 is a `hidden beast` number, since 8 + 6 + 646 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 86646321 - 2¹ = 86646319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86646311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4986 + ... + 14076.

It is an arithmetic number, because the mean of its divisors is an integer number (8046420).

Almost surely, 2^86646321 is an apocalyptic number.

It is an amenable number.

86646321 is a deficient number, since it is larger than the sum of its proper divisors (42096399).

86646321 is a wasteful number, since it uses less digits than its factorization.

86646321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9453 (or 9447 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 86646321 is about 9308.4005607838. The cubic root of 86646321 is about 442.5034989669.

The spelling of 86646321 in words is "eighty-six million, six hundred forty-six thousand, three hundred twenty-one".