88888888665 has 48 divisors (see below), whose sum is σ = 155108904912. Its totient is φ = 47089516032.

The previous prime is 88888888607. The next prime is 88888888667. The reversal of 88888888665 is 56688888888.

It can be written as a sum of positive squares in 8 ways, for example, as 5448211344 + 83440677321 = 73812^2 + 288861^2 .

It is not a de Polignac number, because 88888888665 - 2²⁰ = 88887840089 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (88888888667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9438499 + ... + 9447911.

It is an arithmetic number, because the mean of its divisors is an integer number (3231435519).

Almost surely, 2^88888888665 is an apocalyptic number.

It is an amenable number.

88888888665 is a deficient number, since it is larger than the sum of its proper divisors (66220016247).

88888888665 is a wasteful number, since it uses less digits than its factorization.

88888888665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10810 (or 10807 counting only the distinct ones).

The product of its digits is 3019898880, while the sum is 81.

The spelling of 88888888665 in words is "eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, six hundred sixty-five".