66752352553 has 2 divisors, whose sum is σ = 66752352554. Its totient is φ = 66752352552.

The previous prime is 66752352539. The next prime is 66752352571. The reversal of 66752352553 is 35525325766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64847641104 + 1904711449 = 254652^2 + 43643^2 .

It is a cyclic number.

It is not a de Polignac number, because 66752352553 - 2⁹ = 66752352041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66752352497 and 66752352506.

It is not a weakly prime, because it can be changed into another prime (66752352593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33376176276 + 33376176277.

It is an arithmetic number, because the mean of its divisors is an integer number (33376176277).

Almost surely, 2^66752352553 is an apocalyptic number.

It is an amenable number.

66752352553 is a deficient number, since it is larger than the sum of its proper divisors (1).

66752352553 is an equidigital number, since it uses as much as digits as its factorization.

66752352553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670000, while the sum is 49.

The spelling of 66752352553 in words is "sixty-six billion, seven hundred fifty-two million, three hundred fifty-two thousand, five hundred fifty-three".