99666433 has 4 divisors (see below), whose sum is σ = 100694020. Its totient is φ = 98638848.

The previous prime is 99666407. The next prime is 99666443. The reversal of 99666433 is 33466699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33466699 = 7 ⋅4780957.

It can be written as a sum of positive squares in 2 ways, for example, as 24532209 + 75134224 = 4953^2 + 8668^2 .

It is a cyclic number.

It is not a de Polignac number, because 99666433 - 2⁹ = 99665921 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99666403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513648 + ... + 513841.

It is an arithmetic number, because the mean of its divisors is an integer number (25173505).

Almost surely, 2^99666433 is an apocalyptic number.

It is an amenable number.

99666433 is a deficient number, since it is larger than the sum of its proper divisors (1027587).

99666433 is a wasteful number, since it uses less digits than its factorization.

99666433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027586.

The product of its digits is 629856, while the sum is 46.

The square root of 99666433 is about 9983.3077183867. The cubic root of 99666433 is about 463.6422148353.

The spelling of 99666433 in words is "ninety-nine million, six hundred sixty-six thousand, four hundred thirty-three".