66763327507 has 2 divisors, whose sum is σ = 66763327508. Its totient is φ = 66763327506.

The previous prime is 66763327409. The next prime is 66763327541. The reversal of 66763327507 is 70572336766.

It is a happy number.

66763327507 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 66763327507 - 2¹¹ = 66763325459 is a prime.

It is not a weakly prime, because it can be changed into another prime (66763327567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33381663753 + 33381663754.

It is an arithmetic number, because the mean of its divisors is an integer number (33381663754).

Almost surely, 2^66763327507 is an apocalyptic number.

66763327507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66763327507 is an equidigital number, since it uses as much as digits as its factorization.

66763327507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6667920, while the sum is 52.

The spelling of 66763327507 in words is "sixty-six billion, seven hundred sixty-three million, three hundred twenty-seven thousand, five hundred seven".