99664786 has 8 divisors (see below), whose sum is σ = 160997004. Its totient is φ = 45999120.

The previous prime is 99664777. The next prime is 99664801. The reversal of 99664786 is 68746699.

It can be written as a sum of positive squares in 2 ways, for example, as 97634161 + 2030625 = 9881^2 + 1425^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916605 + ... + 1916656.

Almost surely, 2^99664786 is an apocalyptic number.

99664786 is a deficient number, since it is larger than the sum of its proper divisors (61332218).

99664786 is a wasteful number, since it uses less digits than its factorization.

99664786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833276.

The product of its digits is 3919104, while the sum is 55.

The square root of 99664786 is about 9983.2252303552. The cubic root of 99664786 is about 463.6396609065.

The spelling of 99664786 in words is "ninety-nine million, six hundred sixty-four thousand, seven hundred eighty-six".