99666511 has 8 divisors (see below), whose sum is σ = 114564384. Its totient is φ = 84933600.

The previous prime is 99666499. The next prime is 99666527. The reversal of 99666511 is 11566699.

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

It is a cyclic number.

It is not a de Polignac number, because 99666511 - 2⁹ = 99665999 is a prime.

It is a Duffinian number.

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 (99666311) 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, 39940 + ... + 42361.

It is an arithmetic number, because the mean of its divisors is an integer number (14320548).

Almost surely, 2^99666511 is an apocalyptic number.

99666511 is a deficient number, since it is larger than the sum of its proper divisors (14897873).

99666511 is a wasteful number, since it uses less digits than its factorization.

99666511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82481.

The product of its digits is 87480, while the sum is 43.

The square root of 99666511 is about 9983.3116249068. The cubic root of 99666511 is about 463.6423357857.

The spelling of 99666511 in words is "ninety-nine million, six hundred sixty-six thousand, five hundred eleven".