66382769329 has 2 divisors, whose sum is σ = 66382769330. Its totient is φ = 66382769328.

The previous prime is 66382769287. The next prime is 66382769437. The reversal of 66382769329 is 92396728366.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40532560929 + 25850208400 = 201327^2 + 160780^2 .

It is a cyclic number.

It is not a de Polignac number, because 66382769329 - 2⁹ = 66382768817 is a prime.

It is a super-2 number, since 2×66382769329² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66382769129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33191384664 + 33191384665.

It is an arithmetic number, because the mean of its divisors is an integer number (33191384665).

Almost surely, 2^66382769329 is an apocalyptic number.

It is an amenable number.

66382769329 is a deficient number, since it is larger than the sum of its proper divisors (1).

66382769329 is an equidigital number, since it uses as much as digits as its factorization.

66382769329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 61.

The spelling of 66382769329 in words is "sixty-six billion, three hundred eighty-two million, seven hundred sixty-nine thousand, three hundred twenty-nine".