9866199418776 has 80 divisors (see below), whose sum is σ = 27635835080040. Its totient is φ = 3288573509760.

The previous prime is 9866199418771. The next prime is 9866199418847. The reversal of 9866199418776 is 6778149916689.

9866199418776 is a `hidden beast` number, since 9 + 8 + 6 + 6 + 199 + 418 + 7 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 9866199418695 and 9866199418704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866199418771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13385820 + ... + 14103636.

Almost surely, 2^{9866199418776} is an apocalyptic number.

It is an amenable number.

9866199418776 is an abundant number, since it is smaller than the sum of its proper divisors (17769635661264).

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

9866199418776 is a wasteful number, since it uses less digits than its factorization.

9866199418776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739046 (or 739033 counting only the distinct ones).

The product of its digits is 1975228416, while the sum is 81.

The spelling of 9866199418776 in words is "nine trillion, eight hundred sixty-six billion, one hundred ninety-nine million, four hundred eighteen thousand, seven hundred seventy-six".