16666666697 has 2 divisors, whose sum is σ = 16666666698. Its totient is φ = 16666666696.

The previous prime is 16666666631. The next prime is 16666666711. The reversal of 16666666697 is 79666666661.

16666666697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13419832336 + 3246834361 = 115844^2 + 56981^2 .

It is a cyclic number.

It is not a de Polignac number, because 16666666697 - 2¹² = 16666662601 is a prime.

It is not a weakly prime, because it can be changed into another prime (16666666607) 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, 8333333348 + 8333333349.

It is an arithmetic number, because the mean of its divisors is an integer number (8333333349).

Almost surely, 2^16666666697 is an apocalyptic number.

It is an amenable number.

16666666697 is a deficient number, since it is larger than the sum of its proper divisors (1).

16666666697 is an equidigital number, since it uses as much as digits as its factorization.

16666666697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 65.

The spelling of 16666666697 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred ninety-seven".