99965855 has 16 divisors (see below), whose sum is σ = 135088128. Its totient is φ = 70356000.

The previous prime is 99965849. The next prime is 99965857. The reversal of 99965855 is 55856999.

It is not a de Polignac number, because 99965855 - 2⁴ = 99965839 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99965855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99965857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27611 + ... + 31020.

It is an arithmetic number, because the mean of its divisors is an integer number (8443008).

Almost surely, 2^99965855 is an apocalyptic number.

99965855 is a deficient number, since it is larger than the sum of its proper divisors (35122273).

99965855 is a wasteful number, since it uses less digits than its factorization.

99965855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58678.

The product of its digits is 4374000, while the sum is 56.

The square root of 99965855 is about 9998.2926042400. The cubic root of 99965855 is about 464.1060483304.

It can be divided in two parts, 9996 and 5855, that added together give a palindrome (15851).

The spelling of 99965855 in words is "ninety-nine million, nine hundred sixty-five thousand, eight hundred fifty-five".