16660002 has 8 divisors (see below), whose sum is σ = 33320016. Its totient is φ = 5553332.

The previous prime is 16659997. The next prime is 16660013. The reversal of 16660002 is 20006661.

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

16660002 is an admirable number.

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, 1388328 + ... + 1388339.

It is an arithmetic number, because the mean of its divisors is an integer number (4165002).

Almost surely, 2^16660002 is an apocalyptic number.

16660002 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.

16660002 is a wasteful number, since it uses less digits than its factorization.

16660002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776672.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 16660002 is about 4081.6665713897. Note that the first 3 decimals coincide. The cubic root of 16660002 is about 255.4024249456.

Adding to 16660002 its reverse (20006661), we get a palindrome (36666663).

The spelling of 16660002 in words is "sixteen million, six hundred sixty thousand, two".