916666649 has 2 divisors, whose sum is σ = 916666650. Its totient is φ = 916666648.

The previous prime is 916666627. The next prime is 916666661. The reversal of 916666649 is 946666619.

916666649 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., 623401024 + 293265625 = 24968^2 + 17125^2 .

It is a cyclic number.

It is not a de Polignac number, because 916666649 - 2¹² = 916662553 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 916666649.

It is not a weakly prime, because it can be changed into another prime (916666549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458333324 + 458333325.

It is an arithmetic number, because the mean of its divisors is an integer number (458333325).

Almost surely, 2^916666649 is an apocalyptic number.

It is an amenable number.

916666649 is a deficient number, since it is larger than the sum of its proper divisors (1).

916666649 is an equidigital number, since it uses as much as digits as its factorization.

916666649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 53.

The square root of 916666649 is about 30276.5032492195. The cubic root of 916666649 is about 971.4127743013.

The spelling of 916666649 in words is "nine hundred sixteen million, six hundred sixty-six thousand, six hundred forty-nine".