667732249 has 2 divisors, whose sum is σ = 667732250. Its totient is φ = 667732248.

The previous prime is 667732237. The next prime is 667732259. The reversal of 667732249 is 942237766.

667732249 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., 406748224 + 260984025 = 20168^2 + 16155^2 .

It is a cyclic number.

It is not a de Polignac number, because 667732249 - 2⁹ = 667731737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667732199 and 667732208.

It is not a weakly prime, because it can be changed into another prime (667732259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333866124 + 333866125.

It is an arithmetic number, because the mean of its divisors is an integer number (333866125).

Almost surely, 2^667732249 is an apocalyptic number.

It is an amenable number.

667732249 is a deficient number, since it is larger than the sum of its proper divisors (1).

667732249 is an equidigital number, since it uses as much as digits as its factorization.

667732249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 46.

The square root of 667732249 is about 25840.5156488798. The cubic root of 667732249 is about 874.0456529311.

The spelling of 667732249 in words is "six hundred sixty-seven million, seven hundred thirty-two thousand, two hundred forty-nine".