99966642 has 8 divisors (see below), whose sum is σ = 199933296. Its totient is φ = 33322212.

The previous prime is 99966631. The next prime is 99966673. The reversal of 99966642 is 24666999.

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

99966642 is an admirable number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8330548 + ... + 8330559.

It is an arithmetic number, because the mean of its divisors is an integer number (24991662).

Almost surely, 2^99966642 is an apocalyptic number.

99966642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99966642 is a wasteful number, since it uses less digits than its factorization.

99966642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16661112.

The product of its digits is 1259712, while the sum is 51.

The square root of 99966642 is about 9998.3319608823. The cubic root of 99966642 is about 464.1072662479.

The spelling of 99966642 in words is "ninety-nine million, nine hundred sixty-six thousand, six hundred forty-two".