90665503884 has 36 divisors (see below), whose sum is σ = 229205785536.
Its totient is φ = 30218730528.
The previous prime is 90665503871. The next prime is 90665503889. The reversal of 90665503884 is 48830556609.
It is a happy number.
90665503884 is a `hidden beast` number, since 9 + 0 + 6 + 6 + 550 + 3 + 8 + 84 = 666.
It is a tau number, because it is divible by the number of its divisors (36).
It is a super-3 number, since 3×906655038843 (a number of 34 digits) contains 333 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 90665503884.
It is not an unprimeable number, because it can be changed into a prime (90665503889) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240517 + ... + 489059.
It is an arithmetic number, because the mean of its divisors is an integer number (6366827376).
Almost surely, 290665503884 is an apocalyptic number.
It is an amenable number.
90665503884 is an abundant number, since it is smaller than the sum of its proper divisors (138540281652).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
90665503884 is a wasteful number, since it uses less digits than its factorization.
90665503884 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 258686 (or 258681 counting only the distinct ones).
The product of its (nonzero) digits is 6220800, while the sum is 54.
The spelling of 90665503884 in words is "ninety billion, six hundred sixty-five million, five hundred three thousand, eight hundred eighty-four".