66245594699 has 2 divisors, whose sum is σ = 66245594700. Its totient is φ = 66245594698.

The previous prime is 66245594687. The next prime is 66245594711. The reversal of 66245594699 is 99649554266.

It is a balanced prime because it is at equal distance from previous prime (66245594687) and next prime (66245594711).

It is a cyclic number.

It is not a de Polignac number, because 66245594699 - 2¹² = 66245590603 is a prime.

It is not a weakly prime, because it can be changed into another prime (66245594299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33122797349 + 33122797350.

It is an arithmetic number, because the mean of its divisors is an integer number (33122797350).

Almost surely, 2^66245594699 is an apocalyptic number.

66245594699 is a deficient number, since it is larger than the sum of its proper divisors (1).

66245594699 is an equidigital number, since it uses as much as digits as its factorization.

66245594699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125971200, while the sum is 65.

The spelling of 66245594699 in words is "sixty-six billion, two hundred forty-five million, five hundred ninety-four thousand, six hundred ninety-nine".