9918578966 has 8 divisors (see below), whose sum is σ = 14880344544. Its totient is φ = 4958464120.

The previous prime is 9918578951. The next prime is 9918578983. The reversal of 9918578966 is 6698758199.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9918578896 and 9918578905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397550 + ... + 421761.

It is an arithmetic number, because the mean of its divisors is an integer number (1860043068).

Almost surely, 2^9918578966 is an apocalyptic number.

9918578966 is a deficient number, since it is larger than the sum of its proper divisors (4961765578).

9918578966 is a wasteful number, since it uses less digits than its factorization.

9918578966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825366.

The product of its digits is 58786560, while the sum is 68.

The square root of 9918578966 is about 99592.0627660659. The cubic root of 9918578966 is about 2148.5715383214.

The spelling of 9918578966 in words is "nine billion, nine hundred eighteen million, five hundred seventy-eight thousand, nine hundred sixty-six".