16664855 has 8 divisors (see below), whose sum is σ = 20023872. Its totient is φ = 13314528.

The previous prime is 16664833. The next prime is 16664861. The reversal of 16664855 is 55846661.

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 not a de Polignac number, because 16664855 - 2¹⁰ = 16663831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314 + ... + 6656.

It is an arithmetic number, because the mean of its divisors is an integer number (2502984).

Almost surely, 2^16664855 is an apocalyptic number.

16664855 is a deficient number, since it is larger than the sum of its proper divisors (3359017).

16664855 is an equidigital number, since it uses as much as digits as its factorization.

16664855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345.

The product of its digits is 172800, while the sum is 41.

The square root of 16664855 is about 4082.2610156628. The cubic root of 16664855 is about 255.4272218141.

The spelling of 16664855 in words is "sixteen million, six hundred sixty-four thousand, eight hundred fifty-five".