66226669507 has 2 divisors, whose sum is σ = 66226669508. Its totient is φ = 66226669506.

The previous prime is 66226669493. The next prime is 66226669517. The reversal of 66226669507 is 70596662266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66226669507 - 2¹⁵ = 66226636739 is a prime.

It is not a weakly prime, because it can be changed into another prime (66226669517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113334753 + 33113334754.

It is an arithmetic number, because the mean of its divisors is an integer number (33113334754).

Almost surely, 2^66226669507 is an apocalyptic number.

66226669507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66226669507 is an equidigital number, since it uses as much as digits as its factorization.

66226669507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 66226669507 in words is "sixty-six billion, two hundred twenty-six million, six hundred sixty-nine thousand, five hundred seven".