16686339091 has 2 divisors, whose sum is σ = 16686339092. Its totient is φ = 16686339090.

The previous prime is 16686339083. The next prime is 16686339167. The reversal of 16686339091 is 19093368661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16686339091 - 2³ = 16686339083 is a prime.

It is not a weakly prime, because it can be changed into another prime (16686339491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8343169545 + 8343169546.

It is an arithmetic number, because the mean of its divisors is an integer number (8343169546).

Almost surely, 2^16686339091 is an apocalyptic number.

16686339091 is a deficient number, since it is larger than the sum of its proper divisors (1).

16686339091 is an equidigital number, since it uses as much as digits as its factorization.

16686339091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 16686339091 in words is "sixteen billion, six hundred eighty-six million, three hundred thirty-nine thousand, ninety-one".