9665668854 has 48 divisors (see below), whose sum is σ = 21820453200. Its totient is φ = 3088387008.

The previous prime is 9665668843. The next prime is 9665668877. The reversal of 9665668854 is 4588665669.

9665668854 is a `hidden beast` number, since 9 + 66 + 566 + 8 + 8 + 5 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 9665668791 and 9665668800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5952 + ... + 139164.

It is an arithmetic number, because the mean of its divisors is an integer number (454592775).

Almost surely, 2^9665668854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9665668854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10910226600).

9665668854 is an abundant number, since it is smaller than the sum of its proper divisors (12154784346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9665668854 is a wasteful number, since it uses less digits than its factorization.

9665668854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133389 (or 133386 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 63.

The square root of 9665668854 is about 98314.1335414192. The cubic root of 9665668854 is about 2130.1522115652.

The spelling of 9665668854 in words is "nine billion, six hundred sixty-five million, six hundred sixty-eight thousand, eight hundred fifty-four".