99966905 has 4 divisors (see below), whose sum is σ = 119960292. Its totient is φ = 79973520.

The previous prime is 99966899. The next prime is 99966929. The reversal of 99966905 is 50966999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34421689 + 65545216 = 5867^2 + 8096^2 .

It is not a de Polignac number, because 99966905 - 2²² = 95772601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9996686 + ... + 9996695.

It is an arithmetic number, because the mean of its divisors is an integer number (29990073).

Almost surely, 2^99966905 is an apocalyptic number.

It is an amenable number.

99966905 is a deficient number, since it is larger than the sum of its proper divisors (19993387).

99966905 is a wasteful number, since it uses less digits than its factorization.

99966905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19993386.

The product of its (nonzero) digits is 1180980, while the sum is 53.

The square root of 99966905 is about 9998.3451130675. The cubic root of 99966905 is about 464.1076732507.

The spelling of 99966905 in words is "ninety-nine million, nine hundred sixty-six thousand, nine hundred five".