86663999 has 4 divisors (see below), whose sum is σ = 86986440. Its totient is φ = 86341560.

The previous prime is 86663989. The next prime is 86664007. The reversal of 86663999 is 99936668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86663999 - 2²⁰ = 85615423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86663989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160817 + ... + 161354.

It is an arithmetic number, because the mean of its divisors is an integer number (21746610).

Almost surely, 2^86663999 is an apocalyptic number.

86663999 is a deficient number, since it is larger than the sum of its proper divisors (322441).

86663999 is a wasteful number, since it uses less digits than its factorization.

86663999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322440.

The product of its digits is 3779136, while the sum is 56.

The square root of 86663999 is about 9309.3500847266. The cubic root of 86663999 is about 442.5335908193.

The spelling of 86663999 in words is "eighty-six million, six hundred sixty-three thousand, nine hundred ninety-nine".