16666641 has 24 divisors (see below), whose sum is σ = 25238304. Its totient is φ = 10990080.

The previous prime is 16666631. The next prime is 16666669. The reversal of 16666641 is 14666661.

It is not a de Polignac number, because 16666641 - 2⁵ = 16666609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16666596 and 16666605.

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 23 ways as a sum of consecutive naturals, for example, 25681 + ... + 26321.

It is an arithmetic number, because the mean of its divisors is an integer number (1051596).

Almost surely, 2^16666641 is an apocalyptic number.

It is an amenable number.

16666641 is a deficient number, since it is larger than the sum of its proper divisors (8571663).

16666641 is an equidigital number, since it uses as much as digits as its factorization.

16666641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 751 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 16666641 is about 4082.4797611256. The cubic root of 16666641 is about 255.4363463404.

The spelling of 16666641 in words is "sixteen million, six hundred sixty-six thousand, six hundred forty-one".