516666149 has 2 divisors, whose sum is σ = 516666150. Its totient is φ = 516666148.

The previous prime is 516666121. The next prime is 516666151. The reversal of 516666149 is 941666615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280060225 + 236605924 = 16735^2 + 15382^2 .

It is a cyclic number.

It is not a de Polignac number, because 516666149 - 2⁸ = 516665893 is a prime.

Together with 516666151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516666109) 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, 258333074 + 258333075.

It is an arithmetic number, because the mean of its divisors is an integer number (258333075).

Almost surely, 2^516666149 is an apocalyptic number.

It is an amenable number.

516666149 is a deficient number, since it is larger than the sum of its proper divisors (1).

516666149 is an equidigital number, since it uses as much as digits as its factorization.

516666149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 516666149 is about 22730.2914411584. The cubic root of 516666149 is about 802.4229402299.

The spelling of 516666149 in words is "five hundred sixteen million, six hundred sixty-six thousand, one hundred forty-nine".