9899667550 has 12 divisors (see below), whose sum is σ = 18413381736. Its totient is φ = 3959867000.

The previous prime is 9899667529. The next prime is 9899667551. The reversal of 9899667550 is 557669989.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899667551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98996626 + ... + 98996725.

It is an arithmetic number, because the mean of its divisors is an integer number (1534448478).

Almost surely, 2^9899667550 is an apocalyptic number.

9899667550 is a deficient number, since it is larger than the sum of its proper divisors (8513714186).

9899667550 is a wasteful number, since it uses less digits than its factorization.

9899667550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197993363 (or 197993358 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 64.

The square root of 9899667550 is about 99497.0730725281. The cubic root of 9899667550 is about 2147.2051335197.

The spelling of 9899667550 in words is "nine billion, eight hundred ninety-nine million, six hundred sixty-seven thousand, five hundred fifty".