66762350449 has 2 divisors, whose sum is σ = 66762350450. Its totient is φ = 66762350448.

The previous prime is 66762350429. The next prime is 66762350477. The reversal of 66762350449 is 94405326766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60709510449 + 6052840000 = 246393^2 + 77800^2 .

It is a cyclic number.

It is not a de Polignac number, because 66762350449 - 2⁹ = 66762349937 is a prime.

It is a super-2 number, since 2×66762350449² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66762350396 and 66762350405.

It is not a weakly prime, because it can be changed into another prime (66762350429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33381175224 + 33381175225.

It is an arithmetic number, because the mean of its divisors is an integer number (33381175225).

Almost surely, 2^66762350449 is an apocalyptic number.

It is an amenable number.

66762350449 is a deficient number, since it is larger than the sum of its proper divisors (1).

66762350449 is an equidigital number, since it uses as much as digits as its factorization.

66762350449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 66762350449 in words is "sixty-six billion, seven hundred sixty-two million, three hundred fifty thousand, four hundred forty-nine".