16666627 has 4 divisors (see below), whose sum is σ = 16675120. Its totient is φ = 16658136.

The previous prime is 16666621. The next prime is 16666631. The reversal of 16666627 is 72666661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 72666661 = 179 ⋅405959.

It is a cyclic number.

It is not a de Polignac number, because 16666627 - 2¹¹ = 16664579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16666627.

It is not an unprimeable number, because it can be changed into a prime (16666621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373 + ... + 5785.

It is an arithmetic number, because the mean of its divisors is an integer number (4168780).

Almost surely, 2^16666627 is an apocalyptic number.

16666627 is a deficient number, since it is larger than the sum of its proper divisors (8493).

16666627 is an equidigital number, since it uses as much as digits as its factorization.

16666627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492.

The product of its digits is 108864, while the sum is 40.

The square root of 16666627 is about 4082.4780464811. The cubic root of 16666627 is about 255.4362748181.

The spelling of 16666627 in words is "sixteen million, six hundred sixty-six thousand, six hundred twenty-seven".