66763349 has 2 divisors, whose sum is σ = 66763350. Its totient is φ = 66763348.

The previous prime is 66763337. The next prime is 66763357. The reversal of 66763349 is 94336766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51940849 + 14822500 = 7207^2 + 3850^2 .

It is a cyclic number.

It is not a de Polignac number, because 66763349 - 2²⁰ = 65714773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66763309) 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, 33381674 + 33381675.

It is an arithmetic number, because the mean of its divisors is an integer number (33381675).

Almost surely, 2^66763349 is an apocalyptic number.

It is an amenable number.

66763349 is a deficient number, since it is larger than the sum of its proper divisors (1).

66763349 is an equidigital number, since it uses as much as digits as its factorization.

66763349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 44.

The square root of 66763349 is about 8170.8842238769. The cubic root of 66763349 is about 405.6760521860.

The spelling of 66763349 in words is "sixty-six million, seven hundred sixty-three thousand, three hundred forty-nine".