168766649 has 2 divisors, whose sum is σ = 168766650. Its totient is φ = 168766648.

The previous prime is 168766643. The next prime is 168766733. The reversal of 168766649 is 946667861.

168766649 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 can be written as a sum of positive squares in only one way, i.e., 110397049 + 58369600 = 10507^2 + 7640^2 .

It is a cyclic number.

It is not a de Polignac number, because 168766649 - 2⁸ = 168766393 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168766649.

It is not a weakly prime, because it can be changed into another prime (168766643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84383324 + 84383325.

It is an arithmetic number, because the mean of its divisors is an integer number (84383325).

Almost surely, 2^168766649 is an apocalyptic number.

It is an amenable number.

168766649 is a deficient number, since it is larger than the sum of its proper divisors (1).

168766649 is an equidigital number, since it uses as much as digits as its factorization.

168766649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 53.

The square root of 168766649 is about 12991.0218612702. The cubic root of 168766649 is about 552.6228976623.

The spelling of 168766649 in words is "one hundred sixty-eight million, seven hundred sixty-six thousand, six hundred forty-nine".