66733349 has 2 divisors, whose sum is σ = 66733350. Its totient is φ = 66733348.

The previous prime is 66733333. The next prime is 66733351. The reversal of 66733349 is 94333766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60730849 + 6002500 = 7793^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 66733349 - 2⁴ = 66733333 is a prime.

Together with 66733351, 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 (66733309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33366674 + 33366675.

It is an arithmetic number, because the mean of its divisors is an integer number (33366675).

Almost surely, 2^66733349 is an apocalyptic number.

It is an amenable number.

66733349 is a deficient number, since it is larger than the sum of its proper divisors (1).

66733349 is an equidigital number, since it uses as much as digits as its factorization.

66733349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 41.

The square root of 66733349 is about 8169.0482309753. The cubic root of 66733349 is about 405.6152797957.

The spelling of 66733349 in words is "sixty-six million, seven hundred thirty-three thousand, three hundred forty-nine".