99800866 has 32 divisors (see below), whose sum is σ = 166997376. Its totient is φ = 44352000.

The previous prime is 99800851. The next prime is 99800867. The reversal of 99800866 is 66800899.

It is a happy number.

99800866 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (99800867) 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, 282546 + ... + 282898.

It is an arithmetic number, because the mean of its divisors is an integer number (5218668).

Almost surely, 2^99800866 is an apocalyptic number.

99800866 is a deficient number, since it is larger than the sum of its proper divisors (67196510).

99800866 is a wasteful number, since it uses less digits than its factorization.

99800866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

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

The square root of 99800866 is about 9990.0383382648. The cubic root of 99800866 is about 463.8505792409.

The spelling of 99800866 in words is "ninety-nine million, eight hundred thousand, eight hundred sixty-six".