99666673 has 6 divisors (see below), whose sum is σ = 100099106. Its totient is φ = 99235632.

The previous prime is 99666667. The next prime is 99666709. The reversal of 99666673 is 37666699.

It can be written as a sum of positive squares in only one way, i.e., 96177249 + 3489424 = 9807^2 + 1868^2 .

It is a de Polignac number, because none of the positive numbers 2^k-99666673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99666673.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99666653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213186 + ... + 213652.

Almost surely, 2^99666673 is an apocalyptic number.

It is an amenable number.

99666673 is a deficient number, since it is larger than the sum of its proper divisors (432433).

99666673 is an frugal number, since it uses more digits than its factorization.

99666673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391 (or 924 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 52.

The square root of 99666673 is about 9983.3197384437. The cubic root of 99666673 is about 463.6425869902.

The spelling of 99666673 in words is "ninety-nine million, six hundred sixty-six thousand, six hundred seventy-three".