16666683331 has 2 divisors, whose sum is σ = 16666683332. Its totient is φ = 16666683330.

The previous prime is 16666683317. The next prime is 16666683343. The reversal of 16666683331 is 13338666661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16666683331 - 2²¹ = 16664586179 is a prime.

It is a super-2 number, since 2×16666683331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16666681331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333341665 + 8333341666.

It is an arithmetic number, because the mean of its divisors is an integer number (8333341666).

Almost surely, 2^16666683331 is an apocalyptic number.

16666683331 is a deficient number, since it is larger than the sum of its proper divisors (1).

16666683331 is an equidigital number, since it uses as much as digits as its factorization.

16666683331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 49.

The spelling of 16666683331 in words is "sixteen billion, six hundred sixty-six million, six hundred eighty-three thousand, three hundred thirty-one".