16668741 has 16 divisors (see below), whose sum is σ = 22740480. Its totient is φ = 10857840.

The previous prime is 16668733. The next prime is 16668749. The reversal of 16668741 is 14786661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16668733) and next prime (16668749).

It is not a de Polignac number, because 16668741 - 2³ = 16668733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16668741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668749) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29326 + ... + 29888.

It is an arithmetic number, because the mean of its divisors is an integer number (1421280).

Almost surely, 2^16668741 is an apocalyptic number.

It is an amenable number.

16668741 is a deficient number, since it is larger than the sum of its proper divisors (6071739).

16668741 is a wasteful number, since it uses less digits than its factorization.

16668741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776.

The product of its digits is 48384, while the sum is 39.

The square root of 16668741 is about 4082.7369496454. The cubic root of 16668741 is about 255.4470742329.

The spelling of 16668741 in words is "sixteen million, six hundred sixty-eight thousand, seven hundred forty-one".