9963776806 has 16 divisors (see below), whose sum is σ = 15829331040. Its totient is φ = 4687500160.

The previous prime is 9963776737. The next prime is 9963776813. The reversal of 9963776806 is 6086773699.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84900 + ... + 164728.

It is an arithmetic number, because the mean of its divisors is an integer number (989333190).

Almost surely, 2^9963776806 is an apocalyptic number.

9963776806 is a deficient number, since it is larger than the sum of its proper divisors (5865554234).

9963776806 is a wasteful number, since it uses less digits than its factorization.

9963776806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83519.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The square root of 9963776806 is about 99818.7197172955. The cubic root of 9963776806 is about 2151.8301925307.

It can be divided in two parts, 9963 and 776806, that added together give a square (786769 = 887²).

The spelling of 9963776806 in words is "nine billion, nine hundred sixty-three million, seven hundred seventy-six thousand, eight hundred six".