5166649 has 2 divisors, whose sum is σ = 5166650. Its totient is φ = 5166648.

The previous prime is 5166647. The next prime is 5166653. The reversal of 5166649 is 9466615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 59049 = 2260^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 5166649 - 2¹ = 5166647 is a prime.

Together with 5166647, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (5166647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583324 + 2583325.

It is an arithmetic number, because the mean of its divisors is an integer number (2583325).

Almost surely, 2^5166649 is an apocalyptic number.

It is an amenable number.

5166649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5166649 is an equidigital number, since it uses as much as digits as its factorization.

5166649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 5166649 is about 2273.0263966791. The cubic root of 5166649 is about 172.8766425454.

It can be divided in two parts, 51666 and 49, that added together give a palindrome (51715).

The spelling of 5166649 in words is "five million, one hundred sixty-six thousand, six hundred forty-nine".