99886555 has 4 divisors (see below), whose sum is σ = 119863872. Its totient is φ = 79909240.

The previous prime is 99886531. The next prime is 99886559. The reversal of 99886555 is 55568899.

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

It is not a de Polignac number, because 99886555 - 2⁷ = 99886427 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99886496 and 99886505.

It is not an unprimeable number, because it can be changed into a prime (99886559) 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, 9988651 + ... + 9988660.

It is an arithmetic number, because the mean of its divisors is an integer number (29965968).

Almost surely, 2^99886555 is an apocalyptic number.

99886555 is a deficient number, since it is larger than the sum of its proper divisors (19977317).

99886555 is a wasteful number, since it uses less digits than its factorization.

99886555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19977316.

The product of its digits is 3888000, while the sum is 55.

The square root of 99886555 is about 9994.3261403658. The cubic root of 99886555 is about 463.9832952641.

The spelling of 99886555 in words is "ninety-nine million, eight hundred eighty-six thousand, five hundred fifty-five".