99666917 has 8 divisors (see below), whose sum is σ = 115185600. Its totient is φ = 84468384.

The previous prime is 99666911. The next prime is 99666923. The reversal of 99666917 is 71966699.

It is an interprime number because it is at equal distance from previous prime (99666911) and next prime (99666923).

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

It is not a de Polignac number, because 99666917 - 2⁸ = 99666661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99666911) 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, 79367 + ... + 80612.

It is an arithmetic number, because the mean of its divisors is an integer number (14398200).

Almost surely, 2^99666917 is an apocalyptic number.

It is an amenable number.

99666917 is a deficient number, since it is larger than the sum of its proper divisors (15518683).

99666917 is a wasteful number, since it uses less digits than its factorization.

99666917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160075.

The product of its digits is 1102248, while the sum is 53.

The square root of 99666917 is about 9983.3319588202. The cubic root of 99666917 is about 463.6429653470.

The spelling of 99666917 in words is "ninety-nine million, six hundred sixty-six thousand, nine hundred seventeen".