16665354427 has 2 divisors, whose sum is σ = 16665354428. Its totient is φ = 16665354426.

The previous prime is 16665354403. The next prime is 16665354457. The reversal of 16665354427 is 72445356661.

16665354427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16665354427 is a prime.

It is not a weakly prime, because it can be changed into another prime (16665354457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332677213 + 8332677214.

It is an arithmetic number, because the mean of its divisors is an integer number (8332677214).

Almost surely, 2^16665354427 is an apocalyptic number.

16665354427 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665354427 is an equidigital number, since it uses as much as digits as its factorization.

16665354427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 49.

The spelling of 16665354427 in words is "sixteen billion, six hundred sixty-five million, three hundred fifty-four thousand, four hundred twenty-seven".