16668839 has 12 divisors (see below), whose sum is σ = 18421032. Its totient is φ = 15071760.

The previous prime is 16668809. The next prime is 16668851. The reversal of 16668839 is 93886661.

It is a de Polignac number, because none of the positive numbers 2^k-16668839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16668793 and 16668802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41789 + ... + 42185.

It is an arithmetic number, because the mean of its divisors is an integer number (1535086).

Almost surely, 2^16668839 is an apocalyptic number.

16668839 is a deficient number, since it is larger than the sum of its proper divisors (1752193).

16668839 is a wasteful number, since it uses less digits than its factorization.

16668839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 755 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 16668839 is about 4082.7489513807. The cubic root of 16668839 is about 255.4475748459.

The spelling of 16668839 in words is "sixteen million, six hundred sixty-eight thousand, eight hundred thirty-nine".