16664887 has 8 divisors (see below), whose sum is σ = 17256960. Its totient is φ = 16076280.

The previous prime is 16664867. The next prime is 16664897. The reversal of 16664887 is 78846661.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16664887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12348 + ... + 13630.

It is an arithmetic number, because the mean of its divisors is an integer number (2157120).

Almost surely, 2^16664887 is an apocalyptic number.

16664887 is a deficient number, since it is larger than the sum of its proper divisors (592073).

16664887 is a wasteful number, since it uses less digits than its factorization.

16664887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733.

The product of its digits is 387072, while the sum is 46.

The square root of 16664887 is about 4082.2649350575. The cubic root of 16664887 is about 255.4273853052.

The spelling of 16664887 in words is "sixteen million, six hundred sixty-four thousand, eight hundred eighty-seven".