66243535507 has 2 divisors, whose sum is σ = 66243535508. Its totient is φ = 66243535506.

The previous prime is 66243535387. The next prime is 66243535529. The reversal of 66243535507 is 70553534266.

66243535507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66243535507 - 2²⁷ = 66109317779 is a prime.

It is not a weakly prime, because it can be changed into another prime (66243535907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121767753 + 33121767754.

It is an arithmetic number, because the mean of its divisors is an integer number (33121767754).

Almost surely, 2^66243535507 is an apocalyptic number.

66243535507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66243535507 is an equidigital number, since it uses as much as digits as its factorization.

66243535507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268000, while the sum is 46.

The spelling of 66243535507 in words is "sixty-six billion, two hundred forty-three million, five hundred thirty-five thousand, five hundred seven".