67566349 has 2 divisors, whose sum is σ = 67566350. Its totient is φ = 67566348.

The previous prime is 67566229. The next prime is 67566377. The reversal of 67566349 is 94366576.

67566349 = T₆₇₁₀ + T₆₇₁₁ + T₆₇₁₂.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50509449 + 17056900 = 7107^2 + 4130^2 .

It is a cyclic number.

It is not a de Polignac number, because 67566349 - 2¹³ = 67558157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67566299 and 67566308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67566379) 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, 33783174 + 33783175.

It is an arithmetic number, because the mean of its divisors is an integer number (33783175).

Almost surely, 2^67566349 is an apocalyptic number.

67566349 is the 6712-nd centered triangular number.

It is an amenable number.

67566349 is a deficient number, since it is larger than the sum of its proper divisors (1).

67566349 is an equidigital number, since it uses as much as digits as its factorization.

67566349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 46.

The square root of 67566349 is about 8219.8752423623. The cubic root of 67566349 is about 407.2960053910.

The spelling of 67566349 in words is "sixty-seven million, five hundred sixty-six thousand, three hundred forty-nine".