9900880066 has 32 divisors (see below), whose sum is σ = 18523665792. Its totient is φ = 3855874560.

The previous prime is 9900880063. The next prime is 9900880079. The reversal of 9900880066 is 6600880099.

It is a happy number.

9900880066 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9900879998 and 9900880025.

It is not an unprimeable number, because it can be changed into a prime (9900880063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397080 + ... + 421276.

It is an arithmetic number, because the mean of its divisors is an integer number (578864556).

Almost surely, 2^9900880066 is an apocalyptic number.

9900880066 is a deficient number, since it is larger than the sum of its proper divisors (8622785726).

9900880066 is a wasteful number, since it uses less digits than its factorization.

9900880066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26874.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 9900880066 is about 99503.1661104309. The cubic root of 9900880066 is about 2147.2927935103.

The spelling of 9900880066 in words is "nine billion, nine hundred million, eight hundred eighty thousand, sixty-six".