99666663 has 8 divisors (see below), whose sum is σ = 133632000. Its totient is φ = 66072888.

The previous prime is 99666661. The next prime is 99666667. The reversal of 99666663 is 36666699.

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

It is not a de Polignac number, because 99666663 - 2¹ = 99666661 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99666661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92263 + ... + 93336.

It is an arithmetic number, because the mean of its divisors is an integer number (16704000).

Almost surely, 2^99666663 is an apocalyptic number.

99666663 is a deficient number, since it is larger than the sum of its proper divisors (33965337).

99666663 is a wasteful number, since it uses less digits than its factorization.

99666663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185781.

The product of its digits is 1889568, while the sum is 51.

The square root of 99666663 is about 9983.3192376083. The cubic root of 99666663 is about 463.6425714838.

The spelling of 99666663 in words is "ninety-nine million, six hundred sixty-six thousand, six hundred sixty-three".