99990663 has 8 divisors (see below), whose sum is σ = 135580800. Its totient is φ = 65530488.

The previous prime is 99990647. The next prime is 99990679. The reversal of 99990663 is 36609999.

It is an interprime number because it is at equal distance from previous prime (99990647) and next prime (99990679).

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

It is not a de Polignac number, because 99990663 - 2⁴ = 99990647 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282283 + ... + 282636.

It is an arithmetic number, because the mean of its divisors is an integer number (16947600).

Almost surely, 2^99990663 is an apocalyptic number.

99990663 is a deficient number, since it is larger than the sum of its proper divisors (35590137).

99990663 is a wasteful number, since it uses less digits than its factorization.

99990663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564981.

The product of its (nonzero) digits is 708588, while the sum is 51.

The square root of 99990663 is about 9999.5331391020. The cubic root of 99990663 is about 464.1444367400.

The spelling of 99990663 in words is "ninety-nine million, nine hundred ninety thousand, six hundred sixty-three".